Associated Namesツバメしんどろ〜む心跳症候群สึบาเมะซินโดรมTubame SyndromeDescriptionThe story revolves around Taiga, who doesn’t have memories from further back than two years ago when his parents died in an accident. He lives with his sister, Tsubame, whom he finds out is from outer space with the job of protecting him as he possesses the Origin Heart.GenreComedy Ecchi Harem Romance Sci-fi ShounenAuthor(s)AKANE KotetsuStatus in Country of Origin8 Volumes (Complete)