Inumaki Toge and Okkotsu Yuuta first met when they were seventeen, both natives of Sukuna Island, a small community off the coast of Japan. Circumstances forced them apart for four years. The last thing Yuuta had gifted Toge was a 500-page notebook meant to be used for letters to Yuuta while he was away. Unfortunately, the plan fell through. When they finally reunited, they found that much had changed, but the island itself remained the same.

Yuta, a young manz is burdened by the memories of a tragic childhood event. When he meets Toge, who is nonverbal due to selective mutism, their unlikely friendship becomes a catalyst for healing and growth. Together, they navigate a web of corruption in their community, seeking justice and redemption. As they uncover the truth, Yuta discovers the power of love, forgiveness, and finding his own voice. This emotionally charged tale explores the limits of communication, the resilience of the human spirit, and the pursuit of a brighter future.