11-ninme no Koibito-kun

It's 'cause Tsubasa's face is so cute!! Even though he knows he's a man!! They make love every night!!!?? Cram school instructor Sano has a kind and hard-working personality, but no luck with women. On the night he's dumped by his tenth girlfriend, the super cute high school girl he saves actually turns out to be a 31-year-old feminine man! Tsukasa, who dresses as a woman working at a cosplay brothel, says, "You're my 11th man today, Dr. Sano." Then, with a cute face that's totally Sano's type, Tsukasa blows him, gets on top, and says, "This is a reward for your hard work...!" A weak straight man who is easily swayed, and a super cute, super forward, older feminine-looking man go from friends with benefits to lovers. Sexy, cute, and a little sad, this is a happy love comedy that indulges in cosplay love!

(Source: Renta!)