
Hopefully this helps someone!
1 - MARUxMU BACKSTORY -- Read Ch1-2 (they are not the main couple). http://www.mangago.zone/read-manga/otona_keikenchi/
2 - MARUxMU PART 1 -- (Read the ONLY chapter) http://www.mangago.zone/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.zone/read-manga/otona_keikenchi/
4 - MARUxMU PART 2 -- (Read Vol 1 Ch 5) http://www.mangago.zone/read-manga/elektel_delusion/
5 - MARUxMU PART 3 ---(Read Vol 1 Ch 6) http://www.mangago.zone/read-manga/elektel_delusion/
6 - MARUxMU PART 4 -- (Read the ONLY chapter) http://www.mangago.zone/read-manga/koibito_kijunchi_dj_u_know/
7 - MARUxMU PART 5 -- (Read the ONLY chapter) http://www.mangago.zone/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.

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.zone/read-manga/otona_keikenchi/
2 - MARUxMU PART 1 -- (Read the ONLY chapter) http://www.mangago.zone/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.zone/read-manga/otona_keikenchi/
4 - MARUxMU PART 2 -- (Read Vol 1 Ch 5) http://www.mangago.zone/read-manga/elektel_delusion/
5 - MARUxMU PART 3 ---(Read Vol 1 Ch 6) http://www.mangago.zone/read-manga/elektel_delusion/
6 - MARUxMU PART 4 -- (Read the ONLY chapter) http://www.mangago.zone/read-manga/koibito_kijunchi_dj_u_know/
7 - MARUxMU PART 5 -- (Read the ONLY chapter) http://www.mangago.zone/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.

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.zone/read-manga/otona_keikenchi/
2 - MARUxMU PART 1 -- (Read the ONLY chapter) http://www.mangago.zone/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.zone/read-manga/otona_keikenchi/
4 - MARUxMU PART 2 -- (Read Vol 1 Ch 5) http://www.mangago.zone/read-manga/elektel_delusion/
5 - MARUxMU PART 3 ---(Read Vol 1 Ch 6) http://www.mangago.zone/read-manga/elektel_delusion/
6 - MARUxMU PART 4 -- (Read the ONLY chapter) http://www.mangago.zone/read-manga/koibito_kijunchi_dj_u_know/
7 - MARUxMU PART 5 -- (Read the ONLY chapter) http://www.mangago.zone/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.

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.zone/read-manga/otona_keikenchi/
2 - MARUxMU PART 1 -- (One chapter) http://www.mangago.zone/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.zone/read-manga/otona_keikenchi/
4 - MARUxMU PART 2 & 3 -- (Read Vol 1 Ch 5-6) http://www.mangago.zone/read-manga/elektel_delusion/
5 - MARUxMU PART 4 -- (One chapter) http://www.mangago.zone/read-manga/koibito_kijunchi_dj_u_know/
6 - MARUxMU PART 5 -- (One chapter) http://www.mangago.zone/read-manga/otona_keikenchi_dj_boku_ni_dake_ijiwaru/
Just wanted to make things clearer <3 Honestly maru kun starts to annoy me '-' with his meanness and f-ing insecurity. he doesn't deserve murasato. he honestly disgusts me with his behavior the second time reading it. -.- mu needs a strong seme to be caring and cuddle him, but he's also an idiot so he'll go along with anything if its maru.
Hopefully this guide works unless they finally just combine the maruxmu moments like it should be. sighhhh
Edit 5/2021 - ;;; im glad it still helps yall

Thank you so much for adding this here! I was confused about the order I should be reading the djs, and I read Elektel Delusion a long time back so I didn't even remember it had 2 different chapters!
I don't hate Maru, I find him to be a bit annoying. But Mu has all my sympathy. Being doubted and tested by your partner for your past actions is just sad.

THAN SHE'S PULLING THE SWING!! T-T ughh she looked so bratty before but kids are honestly cute and just learning at a different pace <3 and he handles it so perfectly!!! I love how much she looks like her dad they are literally perfect, and the black hair is so sparkling!! ε=ε=(ノ≧∇≦)ノ thank you so much for this translators/authors/whoever! I am in love with the art and even short chapters are so gratifying <3 <3 <3

I know an author is really the best when they have me doubting my original thoughts and perceptions of characters, but still wanting to read more. Even though we're led to believe Tenyuu is her end-all be-all, this kind of comes as a reminder that no one is just on exclusive "waiting list" for you. If someone is a great person, they will attract others. And if you do not have the courage to pursue them, they can be taken. Just as Momo-san can take Tenyuu, or Fuyu-kun can take Mairu. Whether they end up together depends on one of them taking a leap, and the other accepting feelings or not. ^-^ I hate that I'm so thoughtful right now instead of sleeping, but I'm so grateful for this story.
i couldn't read it with anything but a straight face. i'll come back eventually when kang jinha punches that guy in the face or something. :/ im just gonna avoid updates for a while. someone reply to this when it gets good again. To me, the plot feels drawn out and honestly just bad. You can't tell me this whole story revolves around some evil brat with a shitty backstory. Like, ugh. Shaking my head.