Omega wa Pink no Yume wo Miru
The Alpha liked his omega secretary and he ended up getting a potion to induce his heat. He put some of the potion in a water bottle and the omega gave ut to his friend and he went into heat and then they both did the devils tango in the bathroom. Later on he find out he had the potion to induce heat and gets mad at the alpha.
Love Shuttle
Its a hate to love relationship everyone thinks that the omega is an alpha but then he goes into heat and sleeps with the alpha he hates. They kept sleeping together and then they began to like each other other then for sex.
Sayonara Alpha
So everyone thinks the omega is an Alpha but he really just works hard. He meets a elementary school kid and goes into heat. They're soulmates but there's a fat age gap. The Omega doesn't want to do anything to the kid because he is so little and takes suppressants so that he can see the Alpha. He overdoses because he drinks too many and the Alpha goes away until he is of age and goes to find the Omega.
Black Mirror
Idk why I really like it
Sensei, Mou Dame Desu
Relatable like the guy not wanting to fall in love with people who love him
Even If You Don't Love Me