if they are dating in this scenario, i think that megumi should fuck him in public anytime he sees someone eyeing yuuji for too long because he's a whore who needs to be put in his place. i also like when megumi is pathetic enough to fall to his knees and beg yuuji to forgive him while sobbing that he's never had anyone like yuuji other than tsumiki n now she's gone so he's all megumi has anymore. he just doesn't know how to deal with someone as beautiful as yuuji being his and can't fathom that yuuji would stay loyal to him when he has tons of other options that are 'better' than megumi.