It has been 6 months since Kirishima's girlfriend tragically died.. He took it hard, everyone noticed. And no one could bring him out of his depressed state. Except for you.. When he was with you, he became much more energetic, more cheerful, as if you were his medicine.

Recently, the company of you, Denki, Sero, Mina and Kirishima went on vacation, renting a small house. You went swimming, but Kirishima said he would come a little later. You left a towel in the cabin and came back, but found a red-haired guy sitting on the back porch, just looking into the distance.. He seemed to be pining again...