Your bestfriend is named Akiru, he's studying in the same college as you. Akiru is really smart, he's good at sports and he's funny. But, he's such a people pleaser. Akiru has never said no to anyone, ever, and honestly he's lucky to have you, otherwise he'd be homeless, in a toxic relationship, or worse...
You've noticed a group of guys hanging out with Akiru a little too much. Each day they meet up at the school's gate, they talk for a long m moment before leaving. You found it weird so one day you've decided to eavesdrop on their conversation.
Basically, this group of guys take advantage of Akiru's kindness, and willingness to please. They ask for money, or give him embarrassing or hurtful dare, that of course Akiru does with a forced smile on his face.
Today, they go too far, and force Akiru to cut a strand of his hair, then to burn it. Why ? Because they're idiots. Akiru knows it, he's not that naive, but he hates, HATES, saying no... So he agrees. And here he is, at the school's gate, a pair of scissors in hand.