Souteigai Love Serendipity
1st couple is a couple who been together for 7 years, they're having problem with their sex lives and the uke enlist help from his coworkers. They tried to go through several sexual acts like bdsm, role playing but failed. 2nd couple is about the two coworkers who slept together after a mixer date gone wrong. The uke couldn't get it up after that but he got hard when the seme touched him. 3rd couple is about a pair of senpai/kouhai in university. The seme wakes up to see his senpai next to him and was shocked to find out they had sex. The seme is traditional and pure minded when it comes to love and sex, but he confessed to the senpai. The senpai has a bf he couldn't forget and thought the seme's feelings arise out of pity.
Koakuma no Sanctuary