I'm going with the first time prompt this is my first lemon so it won't be too good

After the war Sonic and Infinite, also known as Zero, met up Sonic seeing that Zero was corrupted by the phantom ruby decided to get to know him in secret
Over the time that they were meeting up they became friends and then more Tonight was there 6 month anniversary and they both were planning to take their relationship a step further for kisses and cuddles

Sonic's POV

I was nervous about seeing Zero today cause I was planning something special for our anniversary but because of that I kept zoning out which was worrying and making my friends suspicious
"Alright Big Blue spill what's got you zoning out so much" Rouge asks to which "N-nothing just thinking of... Stuff"
"Sounds like you're trying to hide something blue... Maybe a secret boyfriend" Knuckles says with a wiggle of his eyebrow while hugging Shadow who was on his lap
My face burst red at the word secret boyfriend "Wha... Why would you even guess that"

No one's POV

Shadow's ears perk at Sonic's reaction "OMG that's so cute. How long have you two been together Big blue?" Sonic's ears fold down in submission as he answers "6 months to the day... It's our anniversary and I'm just worried I'll mess up with my gift or maybe he won't like it" Sonic's breathing quickens and his ear are pressed back to his skull
Shadow gets up off  Knuckles lap and walks over to Sonic puts a hand on his shoulder "Come on let's talk about it just you and me, I have more experience being a boyfriend than you so you can ask for advice and stuff on it ok" Shadow starts walking to a soundproof room and Sonic follows once their in they lock the door

With Knuckles and Rouge

"What just happened?" Knuckles asked confused "Shadow's older brother side just kicked in I think" Rouge answers a little stunned "Cute" Knuckles mumbles

Back with the two hedgys

"Ok so what exactly is your gift I need to know to help" Shadow asks curious
Sonic blushes so hard that even his ears are red "my v...v-virginity. I was planning on have our first time tonight but I don't know what I'm really doing plus it's even for embarrassing cause I have a pussy too" Sonic covers his face
Shadow chuckles "Ok so first thing to warn you about it hurts a lot the first time but it gets better after he's in you need to take time to adjust so your walls don't rip second use protection at the very least it will help with the clean up cause in the moment it may feel great to be filled up with that warm liquid but the next morning, if you don't clean up before sleeping, it can feel very awkward and uncomfortable unless your into having it drip out of you also" Shadow reaches into his quills and hands Sonic a bottle of pills "those will help for the soreness you'll have in the morning depending on how hard you two go at it you might not be walking tomorrow and don't for get lube it will help give less pain when he stretches you out and with him going inside " Sonic hugs Shadow "Thank you so much" Shadow hugs back "No problem but if this..." Pauses as he doesn't know the name which Sonic helpfully supplied "Zero" "Zero decides to break your heart I'll break him"

*Time skip*

Sonic was making his way to Infinite's house
Once he got there he knocked on the door immediately after the door open Sonic jumped on Infinite shouting "Zero" Infinite caught him and brought him inside shutting the door and pressing Sonic up against it as he gave him a sweet tender kiss they both parted panting
Sonic lightly smirked "that's one way to welcome me and say hello" Infinite nuzzles he cheek "well I really missed you Happy Anniversary" he kissed Sonic's cheek earning him some giggles as the day them down on the couch Sonic in his lap "Happy Anniversary Infinite... I-i um... Well you see... I was hoping to... I want to do it" Sonic buried his face in Infinite's chest blushing which caused Infinite to chuckle and whisper huskily in Sonic's ear "I guess we had the same idea for our anniversary I already set up the bedroom and everything"
Sonic looks up into Infinite's mismatched eyes and said "Take me then" He was then held bridal style and carried to the bedroom and layed down on the bed and his boyfriend crawled over him and smashed there lips together
Licking Sonic's lips Infinite asked for entrance into the hot wet cavern that was Sonic's mouth which he gladly open and even suckled on Infinite's tounge causing both to moan into the kiss before breaking it a string of saliva connecting them Infinite move to kissing and sucking on Sonic's neck leaving multiple hickeys on the moaning mess that was Sonic slowly he kissed down his body to Sonic's erection and kissed the tip of it "cute it's small just like you" Sonic whined out "Hey~" in a weak protest
Infinite started to spread Sonic's legs apart and go in-between them his own cock out and ready though he knew he would have to stretch Sonic out since he didn't want to hurt his little chibi hero who was a virgin
Though to this suprized he saw not only his tail hole but also a pussy and smirked as he got down on his stomach so his face was level with Sonic's pussy and commented "My my quite the suprize to see you have this cute like pussy" before giving it a small kiss

Sonic's POV

My body was all heated up with all the kisses and light caresses that Infinite was giving me his comment about my pussy made my cheeks glow with heat but then I felt him kiss it causing me to squeak but it didn't end there I feel something wet run over it and swirl around the entrance of my pussy "Aaa~♥" I couldn't hold back any of the sounds I was making "it so cute how sensitive you are" he teased me and all I could do was whine his name "Zero~" then that wet feeling came back but this time it didn't stop at the entrance it went inside me making me mewl out in delight as it move all around inside me licking my walls my hands free of my gloves clawing at the mattress my legs wrapped around Infinite's neck to give him easier access to my fully exposed body he pull his tongue out and looked at me
I probably looked like a mess I can feel the drool and tears sliding down my face while it's hot as hell not to mention my quills which are probably a mess he slowly climbs over me and stares before giving me an open mouth kiss on the lips and saying "You look absolutely gorgeous" his deep voice sends a shiver straight down my spine

Infinite's POV

I felt him shiver when I called him gorgeous and absolutely ment it his eyes were glazed with lust and half lidded I knew he wanted me to continue so I grabbed some lube and put it on my fingers circled one around the edge of his pussy before pushing it in which earned me a small wince but not terrible since I already started to stretch his delicious pussy with my tongue I give him sweet kisses all over my mates adorable face and lips to distract him from the pain of being stretched one I was finished I pulled my fingers out of him to which he whimpered "it feels... So empty"
I shush him "don't worry I'll fill it with something bigger but it will hurt a bit, ok?" And kiss him on the cheek as I put on a condom "mhmm" he hums I get back between his legs and put his left one over my shoulder and hold his right hand in mine
I look him straight in the eye and ask  "are you ready" Sonic nodded his head "as I'll ever be" I line up and start pushing in which caused him to his in pain so I kissed him deeply and snapped my hips forward fully sheathing my 8 1/2 in dick in him and moan from how tight Sonic is even though I stretched him out I saw he had teared up a little in pain so I kiss his tears away "I'll stay here as long as you need" he just buried his head into my neck so I decided to kiss his neck helping him relax but when I used my hand that was holding his leg on my shoulder to pump his member he let out a loud moan that made my cock twitch "I love hearing your voice" I say nipping his ear "move" he said and so I did gaining a grain from a both "your really tight almost as if your trying to make it so I can't get out" I flirt with him "maybe I don-Aaaaaaaa~♥" "found it~" I start pounding into his sweet spot making him a moaning mess as I kissed him every where I could reach before giving him one last french kiss "I'm... Grunt close" "Ahhh Me-Aaaaa too Ah~" then with one last final trust we both came screaming each other's name in ecstasy before I pull out throw away the condom and bring back a wash cloth to clean our stomachs off I then set the cloth off to the side and curled protectively around Sonic my tail wrapped around his delicate waist as he snuggled up into my chest I pull the blankets over us and give him a kiss on the forehead "I Love you Sonic Happy Anniversary Love" he looks up at me from my chest and pecks me on the lips "I love you too Zero best anniversary every" then he snuggled back into my chest and fell asleep with his cute little snores I lay my head on his and start to drift of to sleep my last though was 'My love for you is Infinite'