I would like to add a few ideas.
M / M (A / B / O universe)
- an alpha alone has a car repair shop; one day, in front of his workshop, a damaged car is abandoned, and inside it is an injured omega; alpha takes care of the injured omega and a relationship is born between the two.
- a middle-class omega, who has a college / university scholarship, falls in love with his classmate, a rich alpha who thinks he has everyone at his feet.
M / M
- a junior student needs meditations in mathematics because he can't handle it and a senior offers to meditate on it; the two tease each other a lot, but realize that they have fallen in love with each other and take the next step in their relationship.
F / M
- a girl from a rich family is forced to marry a man as rich as her from another family as rich; her future husband is much older than she is and dies before coming to the altar on her wedding day; so that the other family - of the man - does not lose the agreement made, replaces the dead person with his younger brother; during the marriage, the two fall in love with each other.
M / M or F / M
- a person who is hunted falls in love with the person who hunts her.
- a person who paints, falls in love with the person who is his model for his painting.