Chigiri to Musubi no Houteishiki (Equation of Chigiri & Musubi)

Neko to Watashi no Houteishiki (The Equation of the Cat and Me) (猫と私の方程式)
A girlfriend tries to win the affection of her boyfriend, who is completely obsessed with his new pet cat. To gain his attention, she dresses as a cat to get his love, while the cat is lost somewhere.

Kare to Imouto no Houteishiki (The Equation of Him and His Little Sister) (彼と妹の方程式)
Its a story about a brother obsessed sister who will do anything to keep her brother pure and clean from the clutches of his girlfriend, going as far as drugging him and taking advantage of him, high sexual content.

Joshu to Maid no Houteishiki (The Equation of the Assistant and the Maid) (助手とメイドの方程式)

Ai to Panya to Kataomoi

Hakui to Futago no Houteishiki

Hakui to Are no Houteishiki

Sekijitsu no Kemono