Closet

1) Closet: Osananajimi no Shinjitsu (クローゼット～幼馴染の真実～, The Truth About His Childhood Friend)
2) Closet 0: Ubawareta Junketsu (クローゼット0～奪われた純潔～, Stolen Innocence)
3) Closet 2: Kanojo no Ketsumatsu (クローゼット2～彼女の結末～, Her Conclusion)
4) Closet: Haha no Negai (クローゼット～母の願い～, Mother's Wish)

Note: A live-action AV adaptation (MIMK-057) was released on August 13th, 2018.