OK, I'm calling it right now: This Senpai is the reason preamnesia!Arisa was such an assertive/aggressive lover, however (un)intentional it may have been on Senpai's part.
Eh? You know, just the normal...Sucking, and biting.Biting?I thought there would only be traces of lipstick after kissing at best!!But eh!? Bruises!?How is that even possible!?Sucking and biting?Sucking?You... really don't get it?Wa-! What are you saying!? I haven't even kissed yet, you know!?It's so embarrassing!What... no way...
