Bugs are mean, chat. | Rune Factory 4 Special Blind Playthrough Episode 18

First time playing Rune Factory 4, and this franchise entirely. But it seems like a cute farming fantasy game, so why not? Also, no story spoilers, please. I'll ask for help when needed, and I'll probably need it. Otherwise, please let me figure it out on my own. Tips, tricks and advice are fine, but I have to ask for them first.