The goodwill will increase more when you give a favorite item, and the goodwill will not increase when you give a hated item.

With the increase of goodwill, the goodwill level will also be increased, goodwill level can be increased when you can get gifts from NPCs, Sissy's goodwill reaches a certain level will get magical clothing and furniture.

Water spiders can be obtained by fishing in the ponds and lakes of the Berry Jungle on rainy days.

The Cherry Blossom Snake can be fished for during the day at Mystic Lake, and the Lobster Stew can be obtained by cooking in the Dining Hall.

The recipe for Lobster Stew needs to be developed on your own after reaching chef level 2, and the ingredients require 3 crayfish and 3 eggplants, cooked over medium heat.