Paradigm Shift
Hibiya is a beta researcher and Yagami is a new researcher on Hibiya's research team. Yagami claims to have meet Hibya a long time ago, but Hibiya doesn't remember him. After an accident in the lab, it is revealed Hibiya has transitioned from a beta to an omega and Yagami tries to help him as he adjusts to his new body and work life.
Boku No High Spec Kareshi-sama
Omega Yokomichi is always dumped by his alpha partners after they find out he's a complete top. His latest interest is his eccentric company president and alpha Karasuma.
Omegaverse
Ch. 4: Ω Rui loses his suppressants an he is taken by his ⍺ friend Touma Ch. 5: Ω Kanata is dating ⍺ childhood friend Takeru, but their ⍺ childhood friend Luca and Kanata are fated mates Ch. 6: Ω hating ⍺ Futoshi falls for hopeless romantic Ω Hizuru Ch. 7: ⍺ Nana loves his β childhood friend Rio Ch. 8: Ω Keisuke wants to prove omegas are equals, but the only one who agrees with him is his ⍺ childhood friend Tooru Ch. 10: ⍺ teacher Kazuoka and ⍺ counselor Hasuno discuss their job and love
Immoral Sandwich
After his first heat came suddenly, omega Kazuomi is attacked by several of his baseball teamates only to be saved, then raped by alpha teammate Kadota. When Kazuomi is about to quit the club, Kadota offer to have sex with him regularly to suppress his heat and knowing it's his only way to keep playing, Kazuomi accepts. At the same time, Kazuomi is being threatened by alpha Tendou, who has the key to Kazuomi's collar and is in love with Kadota, into having sex with him when Kadota is finished.
Wagamama mo Kimi no Tame Nara Ikura Demo
Ch. 1-4,7: Omega Mahiro wants to live freely until his first heat comes, so he sleeps with various partners. When he notices shy, virgin alpha Yoneya has an obvious crush on him, Mahiro begins to tease him, but the longer Mahiro is around pure and straightforward Yoneya the more he fall for him and the more anxious he becomes Ch. 5-6,8: Mahiro's omega friend Natsuki reluctantly agrees to go out with playboy alpha Toujimori for a week
Bokura Ga Tsugai Ni Naru Made
Being and omega and the oldest child in a poor family of 7 kids, Haruki's life has many obstacles. He's always been able to endure whatever happens, until he's approached by 1st year alpha Asahina, who starts following him. When Haruki suddenly goes into heat in the library, Asahina shows up and marks him.
Altruist
After a drinking party with members of his college department, beta professor Toono invites alpha Asahi to come drink at his place. But when they get there, Asahi is forced in to having sex with Toono's omega roommate and childhood friend Tsukasa, who is in heat, while Toono films. Asahi continues to help Tsukasa with his unstable heats, until Tsukasa reveals the reason for their situation is that he's in love with Toono, but Toono can't get hard with Tsukasa.
Unmei no Kisu wa Oazuke
Omega Nanao works at an omega drag bar and hates arrogant alphas. Alpha Arisaka is brought to Nanao's bar by a coworker, Arisaka negatively judges their work and gets into a fight with Nanao, but when Nanao grabs Arisaka, his heat starts.
Kurui Naku No Wa Boku No Ban
Because of his childhood, alpha Takaba hates omegas. Takaba transfers to a new job and, while most of his coworkers are betas and alphas, his boss is Karasuma, an omega. When Karasuma brings Takaba with him to business meeting, Takaba discovers that Karasuma sleeps with men to get ahead in the company.
Abarenbo honey