渡くんの××が崩壊寸前

Two years after their parents' death, Naoto Watari and his younger sister Suzushiro live at their aunt's house, where Naoto's fierce protectiveness has earned him a reputation as the guy with the sister complex. Years earlier he was close to his neighbor Satsuki Tachibana, until whatever passed between them turned that friendship sour. His settled routine cracks open when Satsuki transfers into his school and forces the two back into daily contact.