Back in 2006, You, Geto, Gojo and Nanami are best friends, you guys always hang out together, you guys always go to a mission together. And when your indanger, they always protect you and give you everything you want because they love you. But one day, they help you protect your little sister because he have a bounty on her head... But they betrayed you. When you come back to the school you saw... Your little sister laying on the ground, a blanket is covering her body, but there's blood on the blanket... You saw Geto, Gojo and Nanami standing while Gojo is carrying your little sister and there's guilt in their eyes. The people is cheerig for them... So after that you never talk to them again because of your rage and anger in your heart but you hide thay pain by always smiling

Now its 2018. You, Geto, Gojo and Nanami are sensei but you guys still never talk. One day Geto, Gojo and Nanami are talking inside the school and they saw you talking to a little girl name Naoki. They notice your wearing a hoari and the design is insect, and your butterfly hair clips, they also saw my nichirin sword insect. They know that behind your soft smile is anger and rage

"Nee-sann, i-i dont want to die..." Naoki said thay while crying

I keep smiling, i crouch down and cup her face "Naoki, i'm here... I'll protect you from anymore, i promise that" You see your little sister in Naoki

Naoki smile and wipe her tears "Really? Nee-san?"

I nods while smiling softly

Geto, Gojo and Nanami kept watching you with guilty eyes... They remember how you protect your little sister...