fun fan's Favorite

Hopefully this helps someone since no one seems to just combine it.

1 - MARUxMU BACKSTORY -- Read Ch1-2 (they are not the main couple). http://www.mangago.me/read-manga/otona_keikenchi/
2 - MARUxMU PART 1 -- (Read the ONLY chapter) http://www.mangago.me/read-manga/koibito_kijunchi/ (same as Ch 3 of Otana Keikenchi)
3 - MARUxMU SIDESTORY -- (Read Ch4-5) (they are not main couple, again). http://www.mangago.me/read-manga/otona_keikenchi/
4 - MARUxMU PART 2 -- (Read Vol 1 Ch 5) http://www.mangago.me/read-manga/elektel_delusion/
5 - MARUxMU PART 3 ---(Read Vol 1 Ch 6) http://www.mangago.me/read-manga/elektel_delusion/
6 - MARUxMU PART 4 -- (Read the ONLY chapter) http://www.mangago.me/read-manga/koibito_kijunchi_dj_u_know/
7 - MARUxMU PART 5 -- (Read the ONLY chapter) http://www.mangago.me/read-manga/otona_keikenchi_dj_boku_ni_dake_ijiwaru/

Just wanted to make things clearer <3 I honestly have started to like Maru less every time I read him. But this guide is helpful hopefully to someone.