While Marisa is teaching komarisa how to hunt a real foods (normally she eat spider's web) it's starting to rain. while they're waiting for the rain to stop, Marisa says komarisa is pretty mature for someone so young (she's pretty well manner). komarisa says maybe because she's the king's child. she says that her father the king fought and died protecting her and her mother (lol) and she was the best king and the coolest dad in the world.
Marisa's thinking that just like her this kid has a hard life. then she thought about her parents (lol, buri) and she thought it was raining like this when she losing her parents. then she realized that Reimu is in danger. she told komaisa to stay here and she'll go and save Reimu.