Taiyou no Ie

Taiyou no Ie is a 2010 Shoujo Manga series by Taamo.

Mao Motamiya spends most of her time with her neighbors, the Nakamura family, rather than at her own home, as her parents are constantly working for her sake and are rarely home. When her parents get a divorce and she is conflicted with choosing between them, the eldest son of the Nakamura family, Hiro, suggests for her to live with them. Though secretly glad, Mao rejects the offer and chooses to stay with her father. In spite of moving two stations over, Mao continues to visit the Nakamura family until the death of Hiro's parents; Hiro's younger siblings are taken in by relatives and only Hiro remains in the Nakamura house.

Several years pass, and Mao, now seventeen-years-old, is in high school and lives with her father, her stepmother, and the latter's daughter. She continues to check up on Hiro, who is now twenty-three and has a job as an entry level programmer, every now and then, but the stress of adjusting to her new family life causes Hiro to ask again if she'd like to move in with him. This time, Mao agrees.

This series contains the following tropes:

 * Alliterative Name: Mao Motamiya.
 * Childhood Friends: Hiro and Mao.
 * Dogged Nice Guy: Oda.
 * In Series Nickname: Hiro calls Mao "Magyo" because it's cuter.
 * Innocent Cohabitation: Hiro and Mao.
 * Ladykiller in Love: According to Chii, Oda was a ladies' man. After falling for Mao, he changes.
 * Like Brother and Sister: This is how Hiro sees his relationship with Mao, who felt mutually until she developed feelings for Hiro.
 * Love Dodecahedron: Chii likes Oda, who likes Mao, who likes Hiro, who likes Sugimoto, who likes him back.
 * Megane: Daiki.
 * No Sense of Personal Space: Oda.
 * Oblivious to Love
 * Parental Abandonment
 * Shoujo Demographic
 * Slice of Life
 * Three Amigos: Mao, Chii, and Oda.
 * Title Drop: Taiyou no Ie, meaning "House of the Sun," is the name of Mao's cell phone novel.
 * Tsundere: Both Hiro and Mao can be this.
 * Write What You Know: Mao's cell phone novel "House of the Sun" (under the penname "Kuukai") is basically her living with Hiro, but changing their names (e.g. Mao to Kaoru, Hiro to Takeshi). Hiro doesn't realize this, mistakes the kanji for "Kuukai" as "Sorami," and thinks the novel is by his co-worker Sugimoto because she is rumored to writes novels and he feels as though "Kaoru" is similar to Sugimoto; in reality, Sugimoto is merely a fan of Mao's novel.