Shinyaku: Touhou Gensousatsu - Re.Phantasmagoria of Imagine Breaker

Gensokyo's spring has been stolen once again, while a group of people from Academy City had been suddenly transported into Gensokyo at the same time.
Reimu, Marisa, Sanae, and Sakuya each take one of these foreigners as their partners and investigated the cause of this incident.

Résumé

Shinyaku: Touhou Gensousatsu - Re.Phantasmagoria of Imagine Breaker is a Touhou fangame. It features a crossover with the A certain Magical Index series. This game is a remake of the creator's earlier work, Touhou Gensousatsu: Phantasmagoria of Imagine Breaker, which was released in 2012.