Dekakute Ecchi na Ore no Ane

The protagonist, Segawa Shunsuke, has a height far below average, which makes him very anxious as a fellow student. Living apart from his parents’ house, he is currently living in a university dormitory together with other fellow students, but… This spring break, he received an invitation from his parents’ home and returned home for the first time in 10 years. After a while, Shunske bides his time and arrives home, where his memories have always been of his outgrown three older sisters!