"𝑴𝒚 𝒍𝒐𝒗𝒆 𝒎𝒊𝒈𝒉𝒕 𝒃𝒆 𝒂 𝒍𝒊𝒆, 𝒃𝒖𝒕 𝒑𝒍𝒆𝒂𝒔𝒆 𝒍𝒐𝒗𝒆 𝒎𝒆." 𝑻𝒉𝒆 𝒕𝒂𝒍𝒆 𝒃𝒆𝒕𝒘𝒆𝒆𝒏 𝒂𝒏 𝑰𝒅𝒐𝒍, 𝒂𝒏𝒅 𝒂 𝒅𝒓𝒖𝒎𝒎𝒆𝒓. Note: Contains spoiler.

Shin Kujike is a trained assassin who has thrown away his normal life and relationships to provide for his family by taking requests to eliminate targets. After a fall-out, Shin leaves his family and dedicates himself to his job. One single incident causes Shin's entire family to perish, leaving him in the world with no more reason to live. Ready to end everything, Shin comes across a TV program. A live idol concert of B-Komachi. After witnessing the smiles of the idols and the smile of Ai Hoshino, Shin decides to try and make a better life for himself. A few years later, a fateful encounter leads Shin to his beloved idol. After this fateful meeting, what will happen to Shin and his savior?