まりさとアリスのトラップタワー/ Marisa and Alice's Trap Tower

By Desunoya, this is the sequel to MariAri. In this doujin game Marisa and Alice are trapped inside a tower full of traps, and the player must control both characters alternately to navigate them through the puzzles. Co-operative play is also available.

Marisa once again invites Alice to go with her to the "public" library in the Scarlet Devil Mansion. Once they arrive, they find out that the librarian, Patchouli Knowledge, has teamed up with Nitori Kawashiro to build a Trap Tower inside. Marisa and Alice have to scale it using their teamwork in order to collect the books.