Ayano Uchida, now 50, visits her sister's home to reconnect with her nephew after a long time apart. With her sister away on a trip, she's been asked to look after him while he's home alone. Seeing her nephew again after so many years, she's struck by how much he's grown—his mature, masculine frame stirs a fluttering excitement deep within her. Drawn to his manly presence, she feels a warmth building inside her chest. As she imagines the few days they'll spend alone together, she can feel her groin pulsing with anticipation. This long-awaited reunion awakens a growing desire to grow closer to him, to bridge the gap between them in ways she never expected.