Nakasenaide Ne
Ch. 1-3: Nao's new tutor turns out to be Akio, his childhood friend who bullied him. Nao can't concentrate with Akio around, so Akio tells him if he gets the next question right, he'll make Nao cum. Ch. 4: Sonoda dated Matsumoto in high school, but they broke up when he denied their relationship. Now, Sonoda is with Matsumoto again, as coworkers and roommates. But, Matsumoto seems to have changed a lot Ch. 5: Popular Tada and delinquent Yuusuke are cousins and lovers
Ubawareru Koto Marugoto Zenbu
Pg. 7-106,171-189: Yoshinaga infatuated with his childhood friend Takao who is obsessed with large breast. Takao often strays due to his fixation, but Yoshinaga knows how to reel him back in and punish him Pg. 107-170: Takeharu's cousin Toshizou has returned after several years and he has become the kind of sloppy person Takeharu hates. However, Toshizou's presence allows Takeharu to make peace with his father's death.
Fuyushirazu no Koi
Shuuto has loved his cousin and neighbor Chihiro, who often comes through Shuuto's window to sleep in his bed. One night, Shuuto begins masturbating to Chihiro's sleeping form, but when he kisses him, Shuuto's mother walks in. Having caused his mother to cry, Shuuto begins trying to deny his feelings. But, after hearing Chihiro having sex with a girl, Shuuto kisses him again while he's sleeping, but Chihiro wakes up. Realizing Shuuto's feelings, Chihiro starts looking at him differently.
Osananajimi wa boku no hero!
Monjirou, an intimidating company vice president, has always been overprotective of his 2 years younger cousin Nao, who is often targeted by perverted and dangerous men. However, after another incident with a pervert at the flower shop where Nao started working, Nao begins to think about Monjirou differently and Monjirou.
Tengu Datte Koi wo Suru!
Ch. 1-4: Bird tengu Ouki saves injured dog tengu Kuro, who refuses to show Ouki his human form. One day, afraid of his attraction to and his nature as a harbinger of calamity, Kuro leaves Ouki. Miserable with Kuro gone, Ouki goes to look for him, but collapses and is saved by Kuro. While together, Kuro is enthralled by Ouki's scent and the two are finally able to share their love for each other. Ch. 5: After his parents moved overseas, clumsy Mariku has been living with his dependable cousin Riku. However while Mariku is trying to hide his feelings for Riku, Riku suddenly kisses Mariku in his sleep. Ch. 6: While in the middle of a heartbreak trip at a ryokan, Yuuhi is suddenly joined by broke backpacker Noboru, who repays the favor by acting as Yuuhi's lover.
Namaiki Hierarchy
Ch. 1: Mikki's, Yui's kouhai since middle school, obvious feelings for Yui give Yui a sense of superiority and Yui often teases him. However, one night at a drinking party, Yui's plan to provoke Mikki backfires and Mikki snaps Ch. 2-4: Harumitsu began living with his cousin Mitsuru after breaking up with his boyfriend. 3 months have passed and Mitsuru seems exhausted, so Harumitsu decides to move out. However, that night, Mitsuru jerks off Harumitsu in his sleep, saying he won't let him escape
Ouji no Kikan
Ch.1-2: At his sister's wedding, Kou meets his cousin Fumi, who he hasn't seen in several years. However, Fumi, who used to be very chubby, now looks like a prince Ch.3-6: Yasuhiro is troubled by his childhood friend Ritsu's relationship with his senpai Oda in the insect society Ch.7-9: After his childhood friend Shimizu gets a girlfriend, Haijima realizes his feelings for Shimizu and has his heart broken. At the same, their friend Hachiya has realized his own feelings for Haijima
Hard Triangle
Pg.8-56: A psychiatrist is violated by his patient Kei's alter, Rei Pg.59-88: After asking to keep a doll made by his uncle, Yuu is forced to obey his cousin You's every command Pg.92-130: When Gaku's crystal-obsessed CHF Takayuki offers him crystal healing therapy, it escalates into more Pg.131-168: Born to rival families, Honoka and Naomi have their chance to be together after "dying" in the swamp Pg.172-202: Bouncer Kagami finds out his coworker Jin is a virgin and offers to help him out
Goshujinsama to Wanko
Ch.1: Rejected by professor Tatsukawa, Uehara changes his mind by becoming his dog Ch.2: When his senpai Shun becomes a guinea pig, Kurosawa finally confesses Ch.3: Asato is in a secret relationship with his student Ren Ch.4: Manager Atou promises to cure actor Yuzuru of his stage fright Ch.5,8.5: Umina tries to use a love potion on his crush Mitsurugi Ch.6: Cousins Ch.7: Eiru offers to help Riku with his crush on Seita Ch.8: Nakatsu blackmails Isayama after discovering he likes their boss
Zenbu Ore No Mono!