Sanemi and obanai are best friends, they love to bully giyuu the water hashira, Obanai wears a mask and covers his mouth because it is cut, and Sanemi is very curious to see his mouth, Sanemi secretly loved Obanai but never said it, so as not to ruin the friendship.

One day, Sanemi was walking until he saw Obanai, Obanai was sitting on a bench feeding his beloved snake, Sanemi goes to him and says.

"Hello obanai, how about we go bully giyuu?" Sanemi says while looking at obanai's mask.