
Why do I feel that the masochist is like the villain here? I guess the manager should clear out everything as the story progress. Also, I get a feeling that the black-hair idol will have some roles to do in the story.

He's not. This is what happened leading up to the 5 year gap. Honestly the original story is on-going so im surprised to see a side story already. At least I know now it never worked out.
But here's the og story: http://www.mangago.zone/read-manga/toshishita_kareshi_no_renai_kanriguse/sa/mk_chapter-3.2/pg-2/
Theres 2 other parts also later on in the manga of this couple
Thank god for the translator who picked this up (๑•ㅂ•)و✧