Kojirase Omega no Nidome no Koi
Tasuku doesn't remember agreeing to become the mate of his work rival, Nagashide, but Nagashide is prepared to win him over all over again! An omegaverse romance between a determined, high spec alpha and an omega who's determined only to rely on himself. They're not my favorite couple but they work well enough, though I feel like the amnesia introduces an element of mystery that doesn't really pay off. Trigger warning: possible rape (due to amnesia).
Awairo Emaki
A boy fell in love with a priest who saved him as a child, so now that the priest has come back, he's ready to follow him anywhere. A really cute shounen ai with a decent adventure story as they seek out yokai.
Kekkon Shite Kudasai!
Sasaki Kairi is an omega working in a marriage counseling company, and Jinguuji Haruomi is the high spec alpha who demanded that Sasaki be the one to find him a partner. Though Sasaki is determined to find the perfect partner for Jinguuji, Jinguuji himself never seems to take it seriously, always flirting with Sasaki instead. But Sasaki is driven by more than just his job, as he and Jinguuji have a secret past together that Jinguuji has forgotten. A decent story, but the explanation they give for why Jinguuji forgot everything feels very unconvincing to me. The child is very cute. Trigger warnings: threat of rape, implied rape.
Mou Ichido, Nando Demo
When Fujii Takahiro and Kotou Tarou were in high school, the two didn't get along. So how is Fujii supposed to make sense of his life after he gets amnesia and wakes up as a 19 year old living with Tarou? The story weaves between the past, showing how the two moved from friends to more interspersed with Takahiro grappling with his attraction to someone he's trying to see as just a friend. This one is a classic to me and I think it's one of the best written yaois I've seen as far as pacing and character development. Trigger warning: incest themes.
Kowagaranai de, Soba ni Ite