Atelier Rorona: The Alchemist of Arland

From Year 2, Month 7 and onwards, any time you synthesize items in your workshop, you have a random chance in triggering several events that involve Hom and a kitten.

After watching a few of these events, you will eventually unlock the trophy. Unless you straight out stop crafting in Year 2, Month 7 till the end of the game, you will unlock this naturally.