Rinsagi

Isagi - "Thing is, if you get hurt, Blue Lock's done for. That'd present a problem for me. And I don't want any fucking problems. So drink.

Rin - "Hmph. It's lukewarm."

Isagi - "Oh, zip it." Rinsagi is the slash ship between Itoshi Rin and Isagi Yoichi from the Blue Lock fandom.