Love Takes Guts! Godai's Part Time Job Ploy!

As Kyoko cleans out her room, she notices something stuck in the back of her closet. When she pulls it out to inspect it, she realizes its a rock that her late husband gave her. Its quite large and has mysterious green specks in it. Kyoko wonders if it had any special meaning, and asks Godai if he could help her learn something about it.

Synopsis excerpt via Kitsu.