Yandere X Fam

Setting: In Japan/Highschool *dont know too much about Japan or Japanese names, so the names might be a lil cringe*

Character: [MC-Kenji Kami] [MC sister 1- Shiroi Kami] [MC sister 2-Shiro Kami] [MC Mum- Kana Kami] [Mc Childhood friend- Katsuna Shigetoru]

Synopsis: Ever since our BOi Kenji was little his sister were obsessed with him they are very protective of him from other females. Even from his childhood friend. This developed somewhat rivalry between his childhood friend Katsuna and his sisters. He's been living peacefully until one particular day he receieves a letter in his school locker, what can this letter be? How will this event effect his future and relation with his family and friends?

[Edit: idk much about copyright, and stuff like that. So ima leave it at public domain (i dont know what that means) and this is my 1st time writing]