Responses
It's most like (if not based on) this one:
http://www.mangago.zone/read-manga/honjitsu_wa_ohigara_mo_yoku/
But this one is also similar to this one:
http://www.mangago.zone/read-manga/kasegimasen_kara/
Both of these are sweeter and nowhere near as gritty as this one
This has the components of two of my favorite manga, but so far I'm not detecting the charm of either present in this one.