Keita, a young school boy, has two older twin sisters. However, since they are not blood related, they both feel attracted and confess their feelings to him. Keita first reacts denying this fact, although as he starts to attend the same school as his sisters, things begin to change.

If what you are looking is a fun comedy, this is the show to resort to. In Kiss x Sis the same incestuous relationship between siblings develops, being the centre of the series. It is featured in a more corky and funny way, and works well to alter the course from a more dramatic anime, to a more amusing one.

Hidaka Sana goes back to his hometown after living for five years in Tokyo and becoming a high school student. He feels strange bringing back the memories from years ago, specially reuniting with his friends who have changed during that time. One friend in particular, Yatsuhiro Nanaka, seems to have gone through some big change over the years.

This series takes on the memories of the main character, aspect for which is similar to Yosuga No Sora, except for the ecchi elements. They both deal with connections to the past and strong feelings exposed between the characters. A perfect recommendation if you are searching a good drama story.

Aizawa Yuuichi returns to the town where he used to visit his cousin, after several years. His memories about the place though, are completely gone. As he starts to go to school and meet people, he makes connections and finds out about his past.

An anime that seems far from Yosuga No Sora is, however, a gem on this list. From the visual novel created by Key, this adaptation contains several stories related to each character on the course of 24 episodes. Same as the previous item on the list, this show focuses on the memories of Yuuichi, and we see how they start re-surface when interacting with his friends. The melancholy is present throughout the show just like in Yosuga No Sora.

A wedding planner by the name Saeki can't move on his love life because of his past. After being dumped by his girlfriend, he encounters a high school girl. He soon realizes that this girl is in fact his younger sister, daughter of their divorced parents who separated years ago.

An anime that surprisingly flies under the radar. Koi Kaze presents the main theme if an incestuous affair in a special manner, going even deeper than its counterpart Yosuga No Sora. The affair also develops with less nudity, in a more romantic way. A definite must if you are into the brother and sister type of relationship.

Shinichiro is a student who has been living for a year with Hiromi, a girl that attends the same school. However, the way he remembers her is a little bit different, and now she doesn't smile that much, for which he suspects she's hiding something. Both Shinichiro and Hiromi will have to talk to each other and find out the truth about their relation.

Although it may lack the ecchi parts and brother-sister romance, true tears stands out as a well written romance anime. The reminiscing about previous encounters and the close bond between Hiromi and Shinichiro, makes it a great series, with similar drama to Yosuga No Sora. Great recommendation if you want a good romantic story, rated for all people.

Junichi, a second year high school student, spends his life almost in solitude after having his heart broken. One day, he starts to get to know another student by the name Haruka, and his life begins to drastically change.

Same as Yosuga No Sora, the series is adapted from a visual novel. And as it happens in the novel, Amagami SS follows the arc story of each story, without interrupting the main plot line. The romance is quite similar, and the main character has the same quirk personality. Even without the strong ecchi, this show is totally recommendable.