During the summer, I lost you again. Uttering 'I like you' felt like a transgression. Moriyama Rin grapples with an unhealable ailment from birth, concealing it throughout high school. Our bond deepens during the final cultural festival, culminating in a heartfelt concert and shared moments until Rin's untimely passing. In her last breaths, I confess my affection, a sentiment I believed should have remained unspoken. Finding a note with a simple 'I'm sorry' in Rin's hospital room deepens my regret. I realize my unworthiness of being close to Rin. A sudden leap in time reunites us at the riverbank of our first encounter, facing the Rin I longed to meet once more, yearning for her radiant smile. Determined not to repeat past errors, I choose to suppress my emotions, ensuring her eternal happiness in her fleeting life.