New Manga Idea #6

The first draft of this idea came some time ago, though I can't remember when in relation to some of my other manga ideas. There wasn't really any source of conflict, though, so, under inspiration from a recent dream, I'm tentatively putting out this version of the story.

Working Title: Jump

Genre: Seinen, maybe.

Protagonist: Aiiro (愛色), a 14-year-old girl with her dark hair in a short ponytail and tareme eyes. She's the quiet, artistic type, although she can get a bit rowdy with her friends.

Other Main Characters: Yukiame (雪雨), the same age as Aiiro, one of Aiiro's childhood friends. She's kind of chirpy and adventurous. She has brown hair, which she keeps in a bun.
Yoshiko (悦子), Aiiro's little sister. She's 10 years old, plays volleyball, and likes to run around with her friends.
Kenseki (健赤), Aiiro's father. He has reddish hair and looks quite young. He's kind but can be a bit passive.

Antagonist: Unsure.

Setting: Takes place in modern-day Hitachi; however, Aiiro starts spending more and more time in her own little world. By that, I mean she spends more time "jumping": an old childhood play place of hers where she would draw an environment or characters and then jump into it, usually with her friends. This environment consists of everything into which she's jumped and grows every time she adds another sketch. The flora and fauna can grow or die regardless of her presence in the world, though she can keep tabs on this by watching her drawings.

Plot: Aiiro has a normal life and hasn't jumped in some time, but when her little sister becomes persistently, progressively ill and her father starts losing his head, she finds herself drawn to her own world much stronger. That's not to say nothing ever goes wrong there—but saving her own characters is a lot more appealing than staying to watch her life fall apart... Even if it means she may not be able to go back outside...

I'm aware that some of the names are weird, but that's just what happened.