There's No Way This Is Fate
Yuuzen, Kouetsu, and Ginga have been best friends since preschool, and they're at the top of the pecking order at a prestigious academy for only the most elite alphas. With their good looks, money, and academic prowess, they enjoy life on easy mode... at least, until one day, Yuuzen displays symptoms of being an omega! Unable to resist Yuuzen's pheromones despite the medicine they take, Kouetsu and Ginga give in to their instincts. Taking turns, they force themselves upon a confused and ecstatic Yuuzen...
Fuck Buddy
A slutty friend ends up developing a love of anal!? Ryo, who possesses a higher-than-average libido, used to sleep with women he didn't know. His only other sex-obsessed friend, Akanishi, has threesomes on a nightly basis. Two men with strong libido awaken to the meaning of love.
Chika-chan to!
Chika, Nao, and Ryo are all friends...with extra, extra benefits. During a threesome, Nao, a loving and mischevious boyfriend with plenty of affection to go around, proposes Chika try out being a bottom. At first, Chika refuses, but after some convincing from Nao, he eventually gives his ass up to Ryo. Once Chika and Ryo start doing it, a whole new door opens to their relationship.
Yarisugi Party Night
Takase Ai is a horny, enthusiastic university student who looks aggressive but who is actually an idiot. Cute girls from university invite him to a goukon and he happily accepts thinking ?Alright, time to get some chicks!? But oh no, the girls cancel at the last minute. The four jobless guys who met each other at the goukon end up drinking together. After Ai complains that he wants to go home, the others? reply is ?Then how about we do it together?? and suddenly an orgy party begins!?
Harami Bara
Ryuuku Ai Utsu
high school student Toraji went to a party with his childhood best friend, Ryunosuke. At the party, they both got lucky and ended up having a threesome with a cute girl. However, in the heat of the moment, Ryunosuke leaned over the girl's shoulder and kissed Toraji deeply! What's a yankee boy to do when he realizes his best friend is in love with him! Chapters 1-3 & 5.5
Tachi to Neko Docchi ga Ii no?