Onee-chan to Yofukashi!

Two years have elapsed since Hiroki’s father remarried, fundamentally reshaping his domestic life as he began residing with his twin older sisters. Now that the youngest sibling has entered puberty, the comfortable family dynamic he once knew is undergoing a significant and unavoidable transformation. The innocent affection and doting care that previously defined their relationship now evoke a profound sense of embarrassment within him, marking a distinct transition from childhood familiarity to adolescent self-consciousness as he navigates these evolving familial bonds. As Hiroki struggles to reconcile his changing emotions with his sisters' continued attentions, his physiological responses begin to betray his internal turmoil in increasingly complicated ways. What was once simple sibling affection now triggers confusing bodily reactions that escalate beyond his control, creating an intense personal dilemma. This narrative explores the delicate tension between enduring family closeness and the inevitable awkwardness of maturation, as Hiroki finds himself caught between the comfort of being pampered and the overwhelming reality of his developing adolescence.