Senior Sister Is a Monster

The male protagonist, Li Xiaomao, has just entered his freshman year. Good news: I met a senior sister who is super pretty. Not so good news: the senior sister is a monster. If she gets angry, she risks tearing his head off at any time and playing it with a ball. "I'm a monster, but I don't eat people. All the monsters in the school are my little brothers." This is the daily story between a male college student who is a bit dazed in social anxiety, and the monster Kuronaga Naomi. —————— (Daily, fantasy)