Responses
http://www.mangago.me/read-manga/110_ban_wa_uketsukemasen/
http://www.mangago.me/read-manga/buddy_system/
Not sure if you'll like either of these, but they kind of fall into this criteria. Kind of.
I also really love Combination. <3
Or this one.
http://www.mangago.me/read-manga/switch/
Do you know any manga where is a good relationship between cop/detective partners? Like in Combination or Yellow, where your hart flips when you read it :D