Yep, there is like 10 volumes in this series. I cant remember which ones featured the vice pres and his delinquent neighbor I think they have a few volumes. Also, the older brothers of Mikado and Towa have their own story.
if you haven't already found it: http://www.mangago.me/read-manga/i_don_t_dislike_you/
(=・ω・=)
Here's a list of all there stuff, and the rest of the volumes in the series about supporting characters:
https://www.mangaupdates.com/series.html?id=11462
Is there a manga about these two?
I mean we gotta know whats going on between them!
http://www.mangago.me/read-manga/i_want_to_be_naughty/mf/v01/c006.5/10/