Doppo and Hifumi were high school sweethearts, but Doppo swiftly broke it off when they learned they were both omegas. Years later, Doppo is a salaryman and Hifumi is a host, and they're still friends, but that gets complicated when they experience each others' heats for the first time. An interesting read even for someone outside of this fandom, and one of the only omega x omega setups I've read. Trigger warning: mention of sexual harassment.
Seisansei no takai futari no seisansei no hikui seikatsu - Hypnosis Mic dj