Since I got reminded of Mystia’s Izakaya, some bonus stuff that I didn’t do during my main play through but came to mind and so I’ve done now. Game really does have an absurd amount of content for what it costs.
First, Froggy Coins. Collecting and holding 100 Silver Froggy Coins grants a special outfit and a Golden Froggy Coin. Holding is emphasized because you cannot spend them, this isn’t a lifetime count. It is only counting held coins. That wasn’t a problem before updates and DLC, but with updates and DLC Silver Froggy Coins actually have a use to buy old event items and DLC music. You can only get at most 8 coins a day, with 4 coming from the Moriya branch shrine and a possible additional 4 coming from a special DLC shop added in DLC 5 (but that requires unlocking and obtaining special currency). Interacting with the shrine also takes 30 minutes each time, so it’s really difficult to justify doing even with the possible bonuses you can get from it. I definitely spent over 100 coins myself before I realized I needed to hold them. Pain.
The other thing is gap maps. If you make sure to keep up donations to the Hakurei Shrine, you unlock an alternate form of travel where money is used instead of time. This is possibly one of the most useful unlocks in the entire game, and it’s so easy to miss. Again, you can only donate once a day and your options are 100 yen, 500 yen, and 1000 yen. It can take a while.
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