When they have sex, they either do it at the dorms or Katsuki's house— Inko's too pure to hear all that

Katsuki rarely calls Izuku anything other than his real name; sometimes he'll call him "babe"

Since they like dressing up as couples during Halloween, last year they dressed up as Glinda & Elphaba 

- Izuku was Elphaba, Katsuki was Glinda

Izuku and Katsuki take turns being big & small spoon

They're one of those couples that are always seen together at school, whether it be hugging, eating lunch, or just hanging out 

When Izuku tops, he teases Katsuki with orgasm denial

Katsuki will randomly look over Izuku's shoulder and see what he's doing on his phone

When they started dating, Shoto and Ochaco wanted them to break up, not because they were jealous, but because they didn't want Izuku to get hurt— they are fully supportive of their relationship nowadays 

Izuku refers to Katsuki as "my man, my man, my man"

They frequently hang out with each other's friend groups

Whenever Izuku does something dumb or crazy, Katsuki threatens to block him

Izuku dragged Katsuki out to see Wicked three times after it came out

They have matching All Might onesies

Katsuki is fluent in Izuku's muttering and he thinks it's cute

Katsuki takes lube wherever they go because he knows Izuku is just as big a freak as he is 

Katsuki wants to have the biggest, most expensive, most extravagant, most extraordinary wedding ever, Izuku's fine with a normal one, but he has no idea that Katsuki's making plans as we speak

Katsuki once spent an entire interview talking about how much he loves Izuku and how he'd do anything for him

When the roles are reversed, Katsuki is a dominant bottom and Izuku is a submissive top

If they're sitting next to one another, Katsuki will tease Izuku by poking his thigh or subtly reaching in his pants

Katsuki can do no wrong in Izuku's eyes

They are each other's biggest fans/supporters

Izuku and Katsuki are planning on starting a joint agency when they become pros

Katsuki teaches Izuku how to play drums and sometimes their lessons get a little... steamy

Izuku likes to grab and slap Katsuki's ass at random times

Squeezing Katsuki's pecs helps Izuku relieve his stress 

Chile, if those bathroom walls could talk...

Mitsuki and Inko gush over how cute they are, Masaru just silently supports them without being too embarrassing

Izuku masturbates to all of Katsuki's TikToks & Instagram posts, because to him, his man is a SNACK

Katsuki likes cuddling with Izuku partly because he's afraid Izuku will leave without him knowing 

They are each other's first relationship 

Izuku has gotten into multiple arguments in Katsuki's IG & TT comments because a few thirsty fans wanted to get bold and start commenting how hot he is and how bad they wanted him 

They go on double dates with Ochaco and Toga

If they are standing side by side, Katsuki will grab Izuku's ass and start squeezing it while keeping a straight face and not even paying attention to how embarrassed Izuku is

They hold hands everywhere they go 

Katsuki gives Izuku piggyback rides

Eri, Kota, Katsuma, and Mahoro are basically their children 

Izuku has the ability to alter any conversation and find some way to talk about Katsuki; no matter what the convo is about, he'll find a way to relate it to his bf

Katsuki calls Izuku, "Izzy" sometimes

Izuku once choked a reporter out for calling Katsuki mean-spirited and deranged— Japan loved him even more after that, and so did Katsuki

They have no concept of personal space when it comes to each other

They always sit together on the bus; Izuku once got his revenge by jacking Katsuki off to the point of no return 

They collect all of one another's merch— their dorm rooms are full of Dynamight & Deku merchandise respectively 

Katsuki posts thirst traps, but his real reason for doing so is to get a reaction out of Izuku

Katsuki once beat the fuck out of a fangirl for feeling on Izuku's muscles 

Katsuki has a habit of pulling Izuku in his lap and having their faces inches apart 

They're so adorable it's sickening

Katsuki styles and helps Izuku with his hair when needed 

Izuku internally screams whenever he thinks about the fact that he's dating KATSUKI BAKUGO/DYNAMIGHT

- Katsuki does the same thing and big-ass grin appears on his face when he thinks about the fact that he's dating IZUKU MIDORIYA/DEKU

Katsuki doesn't really like pet names for himself, he prefers Izuku just call him Kacchan

- Izuku's started calling him by a new nickname (alongside Kacchan)— "Tsuki" but Katsuki doesn't really know how to feel about it

When Katsuki gives Izuku head, he stares at him the entire time

Izuku sometimes teases Katsuki by moaning in his ear; Katsuki always gets his lick back when they're in private

They have separate & joint YouTube channels; on their joint channel, they do vlogs, pranks, and couple challenges— they have 10M+ subscribers

Most of the time, Katsuki calls Izuku by his name, but he has come up with different variations, such as Izzy, Zuzu, Zuku, Izu, etc

One time on a field trip, Katsuki dragged Izuku off to the bathroom and fucked him in a stall

Izuku and Ochaco meet up to talk about the amazing sex they have with Toga and Katsuki

They both have incredible stamina— they once went 11 rounds back to back

Izuku & Katsuki give single people depression

They always know where the other is