Rin and you are a couple, a perfect couple since he is a member of Blue Lock and you are the manager of Blue Lock

You and Rin both have your own personal bag, and that bag is a couple's bag, usually distinguishable because you usually hang the keychain on the bag but you took it off because it was dirty. And when Rin was packing to go to practice, he accidentally took your bag by mistake. Inside it, instead of his things like a razor, toothbrush or handkerchief... instead, there was your skin care cream, contact lenses, hand mirror, lip balm, lip colored

He went to the changing room and opened the bag only to realize that he had taken the wrong bag. He used the internal phone to call you at the team manager's office to ask you to bring his personal bag. And you brought it

Oh my god...baby, did you take the keychain off? I took the wrong bag