Takane no Hana wa Chirasaretai
"Yukishita Hana, the kind alpha working at Starnyaks Coffee. Renjaku, the arrogant alpha who is a regular at the cafe, his flower studio is nearby. At least that's what the clients think, but Yukishita is actually an omega and has a crush on Renjaku. He couldn't hide his gender anymore when his first heat came unexpectedly... at age 26! And he was seen by none other than Renjaku! "
Youchina Koi O Dou Shiyou
" Sakurano is an omega, he’s all alone, and no one gets him. He sells his body so he can move out of town. One day, a new beta named Takagi moves in and befriends Sakurano. -"
Ore no Kirai na Tsugaisama
Nyaa to Nakukara Aishiteyo
"Uchiumi Sunao mistook the identity of "Tama" twice: First he was drunk, thought Tama was a stray cat and picked him up. Next, he thought Tama was a poor omega being forced to sell his body... but he's actually an alpha that just likes having sex! How many more misunderstandings can happen between them? "
Seku Tsuga
"Hikari (Ω) works in the night business and only cares about money. One day, salaryman Seiroudou Dan (α) asks Hikari to give a farewell gift to his boss, who was Hikari's regular client and is now transferring to a different unit. Since his best client and money source is leaving, Hikari wanted to catch Seiroudou but they unexpectedly cause each other's heat and end up becoming mates during intercourse. It's not much of a deal for Hikari... but the serious Seiroudou wants to get married!"
Erito Ω Wa Yoru ni Oborete