K18

Android 18 x Krillin is a het ship between Android 18 and Krillin in the Dragon Ball series.

Canon
Android 18 was an android created by Dr. Gero to kill Goku and avenge the Red Ribbon Army. After she defeated some of the other fighters she kisses Krillin on the cheek. He becomes infatuated with her after this.

When Android 18 is adsorbed by Cell Krillin tries to fight Cell to get her back but is unsuccessful. After Cell is defeated Krillin tries to make a wish from Shenron to turn her and her brother human but is was beyond Shenron's power. He instead wishes to have the bomb implanted in the androids removed instead. Android 18 thanks him for his before leaving.

Sometime between the Cell Saga and Buu Saga they get together. They later have a daughter named Marron.

Fanon
Is a more popular shipping.