Baritachi (Jishou) no Ore wa Kantan ni wa Dakaremasen!

Kota, a self-centred web designer, is reluctantly introduced to Chitose, a serious, glasses-wearing, quiet-looking man at an informal dinner he attends with his clients. When he prepositioned Chitose, who seemed to be his exact type, he agreed and they quickly found themselves at a love hotel. At first, Kota is happy to see that Chitose is a service-oriented sub who even offers him a blowjob, but... "Why am I being made to cum from getting fucked in MY ass?" Kota's pride as a "total top" is shattered, and he vows to get revenge, but each time, Chitose makes him cum from getting fucked in the ass!

(Source: Takeshobo)

Included one-shot: Hitori ja Tarinai