Tonagura!

Kazuki has been looking forward to her neighbors' return for 10 years, particularly Yuuji, whom she considers her first love but never mustered the courage to confess to before they left. When Yuuji and his family move back into the old house next door, Kazuki's idealized image of him is replaced by a more mature, ecchi-oriented reality. With both families' parents working in South America, they must navigate their shared past and living arrangements, which becomes even more complicated when they start attending the same school.