2年付き合っている彼女ともう別れてしまうくらいの大喧嘩をして傷心中の男子高生を、全く全然下心など欠片も無く純粋に励ましている幼馴染で大学1年目のお姉さん

A heartbroken high school boy got into a big enough fight with his girlfriend of 2 years that they might break up, and his childhood friend who is a first-year college student genuinely tries to cheer him up without any traces of ulterior motives.