Touhou: Aya's Illusion

An RPG that solves another incident in Gensokyo with a total of 75 people + α, including the Koumakyo-Shinkirou and some book sets.
You can organize your favorite characters from the beginning, compatibility and support effects are set for each character, lines etc. are set at the start of the battle, and events and mini games are also enriched.
It is also possible to train as many characters as you like because it is possible to train as much as you like.

In addition, Sai Illusion is treated as a sequel to his past work "Touhou Ma Illusion", and there are some spoilers, but if you do not mind, there is no problem if you start from here.