Totsuren Arawarata Papa wa Obore Aio Deshita

Young Claire lives with her mother and her twin sister in a humble country home. Feeling mature for her age, Claire is tired of being different from everyone she's ever met. However, when her father suddenly appears, she realizes that she wasn't the only "strange" one in the family. As she slowly learns about her family's past, she understands more about herself and her destiny.
(Source: Pocket Comics)