Prolouge - The Strong Bond

A 16 Years old named Oh Y/N has feelings for his childhood friend Yuna, The problem is that Yuna has a boyfriend but that doesn't stop him to be friends with Yuna

One tragic night happens, Yuna's boyfriend was murdered in her eyes, Y/N witnessed it too. He promised something to Y/N and for the sake of Yuna, Y/N decides to avenge the death of Yuna's boyfriend