You and your enemy (Riki) had been caught up in the rain, so you and him stayed in his house. it was a huge mansion..

you we're wearing your uniforms which is white so it's see through, then Riki handed you his oversized shirt "here, take this you look see through." he said while looking away. you began being embarrassed and took his shirt you then asked him to turn around and after you changed, you told him that he can look now. when he turned around, he blushed seeing you in his shirt and how it looks good on you and looked away again