Help I can’t remember the webtoon!!!

Not too long ago before all my saved stories got removed… •_• I was reading this adorable indi webtoon where it has a jock and a pastel haired tw*nk and jts set in an American high school and they first met on a train plying the same retro game and then the jock started saying this girl who turned out to be the pastel haired guys sister. He agrees to tutor him and be friends but he never really feels much with the sister but enjoys his time with the brother and goes on a school trip as a volunteer for kids and ends up laying under the stars with him and almost a kisses. He then confesses to his girlfriends best friend the whole situation and breaks up with his girlfriend but the brother gets upset for hurting his sisters feelings because he broke up with her. I FORGOT PLEASEEEE HELP