Ruri is Sango Himeyuri's younger twin sister. She loves her sister very much and believes that they only need each other. She dislikes Takaki and treats him like a pervert when he helps Sango. She does not want anyone interfering in her life with Sango. But otherwise, she is a nice girl who only wants her sister's happiness.  

Following her graduation from middle school, Konomi Yuzuhara enters the same high school as Takaaki Kono, her childhood friend. As the new school year begins, they meet their childhood friend Tamaki Kosaka, as well as many new accquaintances. Unbeknownst to the group, their encounters with each other will soon lead to many memorable adventures.
 
(Source: Anime News Network)

[Wiki (jp)](https://ja.wikipedia.org/wiki/吉田小南美) | [Wiki (en)](https://en.wikipedia.org/wiki/Konami_Yoshida)

Based on the Visual Novel ToHeart 2 AD (Another Days), the sequel to ToHeart 2.

Volume 1 
Silfa the robot maid is currently working at Takaaki's house. However, she seems to have a little trouble with her duties as part of it involves going out in public to buy groceries, and she's a bit "shy" in a sense. But when it comes to Haruka Yuzuhara's special curry, she'll do what she has to in order to make this special dish for Takaaki. And that includes some competition from Milfa (Harumi). 
Volume 2 
Involves summer, swimsuits and photography. 
(Source: AniDB)

The first and the second volume will feature Komaki Manaka and Kusakabe Yuuki, respectively.

According to Amazon Japan, a two-volume OVA series "ToHeart 2 Dungeon Travelers" was announced.  "ToHeart 2 Dungeon Travelers" is an RPG game on PlayStaion Portable released in 2011.

Time flies by; Hiroyuki and Akari are 12th-graders now. Both of them and their friends have grown up gradually in someway, physically or mentally, but one of their best friends is missing: the lifelike android Multi. To their surprise, Multi is brought to their campus again without notice, yet she is no longer the same Multi they have known.
 
(Source: Anime News Network)

A collection of stories involving the girls of To Heart 2, with each episode focusing on a different character.
 
(Source: Anime News Network)

Ruri Himeyuri