From Bliss:

Takashi works for the local flower shop. The only problem? He has to put up with the manager's constant sexual harassment. An even bigger problem? The manager, Haruhiko, is actually his boyfriend whom he's been dating for about a week. Takashi wants to develop a deeper relationship but he's afraid of committing... Especially since they haven't even done it yet.

Sequel of the oneshot Us, Blooming from Koi to Wana

Ueda Tomoharu is a cop manning a local koban station, and he's quite happy with his job and relatively quiet life until he happens to run into yakuza member Gotouda Aki while chasing down an underwear thief... and is suddenly confessed to! Aki doesn't seem bothered in the least about their ~star-crossed lovers~ status and eagerly dives into a super lovey-dovey relationship with his policeman, but Ueda's about to find out just how dangerous it can be dating a mobster... in more ways than one.
(Source: MU)

From Yaoi Is Life:

Watanabe Chris is a high school teacher.
When his father remarries, he finds himself with an English stepbrother named Wataru. Shortly after Wataru transfers to the school that Chris works at, their parents die suddenly in an accident. Chris and Wataru begin to live together, and before long they fall in love.
Wataru enters his second year of college still living his happily-ever-after with Chris.

At the same time, Wataru's childhood best friend and former suitor, the cross-dressing Rei, is falling for Yamada, who's always secretly had a crush on Chris...!

Shy freshman college student Rikiya knows he likes guys, but has never been in a relationship, only able to look on without expressing his feelings. Living on his own for the first time he decides to try and change his life and joins a gay dating site. Everything seems perfect until he finds himself about to be attacked with nowhere to turn yet desperately hoping for help, when a guy crawls through the wall and says, "There's no helping it. What's your wish?"
(Source: MU)

Romance began for these these two when Satou Hiroshi fell into Tsumabuki's arms. Literally. From the fifth floor. However, when accidents and mishaps seem to start following Tsumabuki, can their love last, especially since it's rumored that noone who have dated Hiroshi have lasted for more than week?
(Source: Bliss)