Ren works as a “troubleshooter,” resolving love affairs in the entertainment district. With his targets constantly falling for his techniques, any job is a guaranteed success!

However, even this seemingly perfect man has a dark past. One day, his beloved younger sister, Haruka, jumped from the roof of a high-rise building, tragically ending her life.

Unable to understand why, Ren continues to be plagued by nightmares, and every year on the anniversary of his sister’s death, he places a bouquet of flowers on the roof of that building.

One year, Ren finds a man named Naoto collapsed on the roof and rushes to help him.

Upon hearing Naoto’s story, Ren learns that he was betrayed by a customer at his bar, fell into debt, and was fired from his job. With nowhere to go, Ren decides to take Naoto in, but their future, or past, doesn’t end there.