Many Dragon Ball fans have long wondered how a girl like Android 18 ended up with a straitlaced guy like Krillin. As it turns out, Akira Toriyama did have an answer for this, and that's actually a key ...

Goku begins to recruit for Team Universe 7 in the Universal Survival Arc and stops by Krillin's house! Gohan vs Krillin and Goku vs Krillin are both sparring matches we see.