It sounds like Goku's life is nice and normal. School, friends, gaming. The moving around sounds disruptive though. Mamoru's sort of glad that he's been able to stay in the same city.

"Mom's--" Mom's what? The answer waits on the tip of his tongue for half a second. "Mom's good. She misses you."

'Good' might not be the best descriptor, but that wasn't baggage to be bringing up as the first thing Goku heard about her. Mamoru doesn't know if he's seen her truly happy in years, and he's certain that not having one of her kids in her life at all is a big factor in that.