Nii-chan

You were his "lil sister", when you discovered that, you were a little surprised, now you live with him and with your other older brother, Itadori. Choso is insisting from two days for being called 'nii-chan', for you. You really don't want to

" For the 10th time, call me 'Choso nii-chan' " Choso said, scolding you a little with his index finger