Kyoudai Matching ~Oya ni Naisho de Gachihame Koubi Seikatsu~ | Siblings Matchup ~secret mating sex life~
Kasen-chan ga Seiga-san ni Kawaigarareru Hon | A book where Kasen-chan is loved by Seiga-san (Touhou Project)
Tenshi-chan ga Iku-san ni Oshioki sareru Hon | A Book where Tenshi-chan Gets Punished by Iku-san (Touhou Project)