I know the word 'obsessive' can sometimes be correlated with yanderes or something toxic (which I don't write) but I'm just gonna snag it as the whole overly protective and very concerned reader. Obsessive habits n stuff to make sure he's okay but nothing that's actually toxic or gross 👍🧈

Also I know the whole 'oh well demon killing someone for their lover is technically yandere' but in this context I think it makes more sense and it's fine, especially considering Gyutaro does the same thing to people who get in his way. My writing I can do what I want; not like the reader is killing Gyutaros loved ones; just annoying humans who are making him struggle. No plot was specified so I tried to work up something. It's not perfect, not honestly not exactly a fan of half of it. But what the hell. Also, Tons of Ume mentions; love Ume she's so cute ❤️❤️

TWS!!

-Mentions of gore (duhh demon reader DUHH)

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Gyutaro was always a crude man, only caring for his little sister. Nobody wanted to interact with him, and the feeling was mutualHis work as a debt collector got dirty, and it wasn't a long shot to say that Gyutaro had killed a few people. Due to this he wasn't to startled by gore or murderExcept for the night he met youOne of his 'clients' hadn't been meeting up at planned times and didn't pay up. Gyutaro was gonna go collect his debt and do what he did bestBut when he broke into the man's house and found you on top of him eating what remained after you mauled his body, Gyutaro felt like he was about to pass out.You had been hungry; you just wanted a snack. You didn't expect to have another human walk in. You considered eating or killing him, but looking at how skinny he was and the poor condition he lived in you felt pity instead.You were a demon but you don't hate humans. You just didn't really care for them.But something about Gyutaro interested you. The way he lived in constant struggle, his strange deformed body, those little birthmarks.. it was just something you had never seen before.You weren't just gonna let him stand there though.'What are you doing here?' You asked firmly as you looked back at the disheveled man that stood before you in shock. He quickly responded; visibly fearful of your presence. He had seen many strong people before, he had hurt many people before. Some people considered him fearless. But seeing a demon in front of him was too much. 'I— I work as a debt collector, man.. I came here to collect my fair share of this old man's money..' he responded, though his voice was shaky and he was clearly startled. 'Hm..' you pondered for a moment. You usually didn't take interest in humans but this man in particular you were rather interested in. You looked over the man's ripped up body, looking in his pockets yet finding no money on him. You let out a little huff and turned back to the man standing before you, licking the blood off of your lips. 'He doesn't have any on him. You'll need to go look around the house. Just don't interrupt me.'You didn't need to tell him twice.Before he left he paused. He didn't ever say thank you but, you had technically just gotten him more money then he was gonna get.. and even though you were a demon you didn't kill him. He figured he should thank you. So he did.It wouldn't be the last time you ran into him. Yoshiwara was an easy place to hunt. A lot of rich humans usually went on trips that required them to walk through the dirty poor streets of the Rashomon riverbank. And while they were there they had nobody left to protect them; no big city surrounding them that would cause a demon to hesitate on an attack.Over time you and Gyutaro ran into each other frequently. He wasn't a threat; and he clearly wasn't reporting you to demon slayers. So you grew rather fond of the man.You would give him little things the humans you killed had, such as cleaner clothes, food, and especially money. He appreciated it.It was odd to him. The fact a demon; a creature that was fueled off of hate and violence was kinder to him than his own kind. But he wasn't one to complain about it.At first he was annoyed; finding your charity to be a form of pity. He hated being looked down on, he could look after himself. But he wasn't stupid. Getting mad at and arguing with a man eating demons because they were helping instead of eating you? Yea no thanks. He stuck with doing his best to be polite.He didn't want to die; he had to live. He needed to take care and provide for Ume. That was his goal; that was his job. And if leeching off of a demon was how he did it, then so be it.You two began to start chatting instead of just having this weird transaction. Afterall you two had known each other a year by now.Gyutaro sort of trusted you. He was still worried this was some form of manipulation and you were gonna end up hurting him or Ume. But you never did.. not even after a year. So he was willing to be more open. He would explain what he needed sometimes; he would rant as well. His rants were quite often. About how people should be more grateful for what they have and how most humans were horrible.You found his passion about the topic endearing; and you found his love for Ume adorable.And you made sure damn well he knew how much you liked him. It was rambling sometimes; and Gyutato didn't believe it at first. But even when he didn't express his feelings he really did cherish it.You made sure other demons left Gyutaro and his sister alone.Most demons knew you were an upper moon and respected your wishes without question, but if one was too cocky you had no quarrels with finding a way to ensure they would get burnt to a crisp in the sun Of course Gyutaro sometimes usd issues with rude people or clients; but thankfully they either all went missing or for some reason became much more willing to work with him.He thinks he knows why. Not like he actually really cared. If he found out you were the reason; he would thank you. It's not like he cared about other humans anyways.You never offered to turn him into a demon because you knew his loyalties remained with his little sister. You respected him so you wouldn't tear him away from her.What started to make him like you even more was when you gave gifts for Ume as well. Ume loved you. At first she was obviously terrified, hiding behind her big brother and crying. But over time you grew on her.You gave her gifts and helped her big brother. Even if you were scary; Gyutaro explained the situation.Ume's entire world was based on Gyutaro and she trusted him with her life. So she trusted you too.'Brother likes you? Oh well I guess I do too' type attitude.Sometimes your nagging about him needing to be careful was a little annoying; but he was glad you cared. He never mind if you killed a man who upset him considering he did the exact same thing when someone upset him.He was already afraid of contact with other humans; so working up to be able to be more close with you was hard. He has horrible trust issues and the fact you had big teeth and claws didn't make him any calmer.He doesn't like being seen as little or weak. He wants to be seen as who he is; not demeaned or babied. So when you respected that his trust formed a bit more.Gyutaro honestly never could really do more than a hug or hand holding for a while. But when winters rolled around he would let you help keep him and Ume warm at night.The bond you had with those two was special. So when you stopped seeing them three years after spending a lot of time with them; you were rightfully worried. But soon enough you discovered what happened. How they nearly died. And how Douma had turned them both into demons.Now there was nothing that could tear the three of you apart. And they didn't have to struggle as much anymore.You were glad.You would be lying if you didn't admit to helping the two climb up the ranks; but you also understood that even without you the siblings were very powerful.As a demon, Gyutaro had changed slightly. He definitely became more violent. You were worried it might ruin the bond you two had and now that you didn't give them anything anymore wouldn't want to see you.But thankfully; that wasn't the outcome. Over time with work you two worked on becoming even closer than you already were. He was more comfortable with opening up now, and even more comfortable with the idea of snuggling.You definitely didn't plan on the two becoming demons; but you definitely weren't complaining.