So...: - MC is the shou - MC time travels back to when he and the ML are in highschool - MC transfers to ML's school - ML has all these ingrained habits from the future so he reacts whenever the MC does something - I remember the ML went to a club and the MC came and started scolding him - they went to this summer study thing - not The Foolish Gong was Reborn but the premise is similar
Could it be The class genius sitting next to me always tries to flirt with me? I remember MC was reborn and transferred to ML's school