Yosuga no Sora: In Solitude Where We are Least Alone

Haruka Kasugano and his twin sister Sora have lost both their parents in an accident, and with them all their support. They decide to move out of the city to the rural town where they once spent summers with their late grandfather. At first everything seems familiar and peaceful, but changes come as Haruka starts to remember things from his youth. (Source: Anime News Network)

Aki-Sora

Aki-Sora revolves around Aki Aoi and Sora Aoi, a pair of close siblings who have shared an intimate bond since childhood. During their coming of age, they each come to realize the true depth of the love they feel for each other and consummate that love in secret. They keep their younger sister, Nami, Sora’s twin in the dark about their new relationship. Nami, clueless of what is happening in her household aims to set her brother up with her best friend, Kana Sumiya. Despite these relationships Nami seems to have feelings for someone near to her too but keeps them secret.

Otherworld Harem Story

Naoki Oikawa was busily fapping away to his naughty porn mags when he was suddenly transported to a fantasy world filled with demon lords, monsters, and… sexy babes? Join the ostensible MC-turned-hero as he helps his comrades defeat the demon lord by using the power of his own semen! (Source: Fakku!)

Bubble de House de ***: Ofuro Maker no Showroom ga Sharehouse de... The Animation

Based on the erotic game by Atelier Kaguya Honky-Tonk Pumpkin. The protagonist, a student, moves into a share house that offers discounted rent in exchange for monitoring a famous bath manufacturer's products. He had thought he didn't get the opportunity, but to his surprise, he's accepted at the last minute. After moving in, he realizes that all the other residents are female upperclassmen from the same school. It's time for some heart-pounding, bath-filled, crazy student life with those ladies!