Walkthrough Love on a Rainy Night

Move to Lumina Square and look for Sad Banbu near the newspaper stand. Talk to him, talk to Mia and go to Clara, who will appear at the newspaper stand. The quest will be temporarily paused.

Return to Lumina Square after some time (rewind, rest, etc.). It may be enough to teleport from one location to another. Talk to Snek, who is standing near Sad Banbu. Complete the combat order "Those Who Care". After winning, return to Snek, talk to him and Banbu. The quest will be completed. You can collect the reward from Meowcello.