Papa Love: Papa to Icha Ero Shitai Musume-tachi to Hitotsu Yane no Shita de

パパラブ パパとイチャエロしたい娘達と一つ屋根の下で

Based on the erotic game by Blue Gale. Ayame has been acting strange of late. Apparently, that person, whom she calls Papa, has been on her mind. Burned into her mind is the scene of her Papa gripping Hyouka's panties. Knowing full well that Papa is lonely, she stumbles upon an ingenious, if dangerous, idea: "I wonder if I can be Mom's replacement?" (Source: AniDB)