Nanahoshi

"Taichi-nii, stop!!" Itsuki, in an effort to get her older childhood friend Taichi — who suddenly quit his job and had become a shut-in — to leave his room, devised a game to play with him that would have them each taking turns to "Grant me one request". However, when Itsuki's request came to "I want Taichi-nii to leave his room.", Taichi made a condition: "Have sex with me."?! That he would make such a "request" didn't even cross Itsuki's mind; and while she was stunned by his demand, Taichi pushed her down and started fondling her chest. Ignoring Itsuki who's experiencing so much pleasure for the first time, he rubs his now-erect penis on her. Her heart isn't ready for sex, yet her body is feeling it...! (Source: DMM)

"Only 2 days of continuous sex and I've already reached my limit, huh." I got reunited with my older childhood friend Yuma-nee at a welcoming party. Exploiting her competitive personality, I succeeded in getting her to drink a lot of sake to get her smashed; and then under the pretense of nursing her I took her with me to a hotel, and there I brought up the idea that we play a game for adults. We follow a simple rule: in this sexual showdown, the first one to give up loses. The opening bell rings starting with a kiss, with the slow and sticky entwining of our tongues serving as preliminaries. I have to gain the initiative by stimulation so I can get to squeeze Yuma-nee's big boobs, and finally my hands move on to her privates. My thing won't settle down from cumming just once or twice. Until Yuma-nee taps out, we'll do consecutive rounds to fuck with no time to rest! (Source: DLsite)

"Ooh... I'm cumming...!" No matter what kind of woman she is, with just a touch I can make her cum. This is my "ability". But without using my ability, I want to get along better with Oikawa-san, the girl I admire... A series of indecent incidents just keep happening everywhere! Like with an office lady who I inadvertently saved on a crowded train, with my sex-loving childhood friend in the toilet, and with a teacher who's questioning me in the home economics room... But there finally comes a time when I touch even Oikawa-san...!? (Source: BookLive)

"By all means, please let me experience it as well, come along and give me your answer...!" Maiko got selected to receive an exclusive, private lesson from Shuu, a very famous and handsome love instructor. ...with his masterful words and aiming for her erogenous zones, Maiko's heart and body becomes putty in his hands... and with the final lesson, she will get to learn the essence of love...!? (Source: BookLive)