A and B are classmates/ co-workers. B is top of the class/ranking and A is second. A sees B as their enemy, always working hard to try and beat B at everything. B knows, to some extent, that A doesn’t like them and is trying to compete with them. One day B beats A and is overjoyed and doesn’t make it much of a secret. Then B finds out that A had something bad happen to them (family death, the death of a pet, serious illness, kicked out of the house etc.) B feels terrible and after work/class asks A to talk and apologises. A starts crying and B comforts them. After that A leans on B for emotional support and B realises they’re falling in love with A. One night they both get drunk and end up sleeping together. They agree it was a one-time thing until it happens again.