The Shiunji Family Children, Vol. 4

"To me, you're my cherished twin brother...and I guess you're also the one I love."Now that they know they aren't related by blood, the Shiunji siblings are beginning to look at one another in a different light. While eldest son Arata tries to resist his younger sisters' advances, his twin, Ouka, is overwhelmed by her own budding feelings. She runs off on a weekend retreat for some respite--or so she claims--but days later, she still hasn't returned! Will Arata find her before she goes missing for good?