As news spreads of Ren's alleged suicide, Sae brings a very much still alive Ren back to the LeBlanc to hide. Upon reuniting with Ren, the gang explain that they took advantage of Sae's cognitive world, which had an interrogation room identical to the one in reality.

The politician who was the mastermind behind all of the cases has been successfully reformed by the Phantom Thieves. However, the public’s reaction was not as expected. In order to eliminate the world’s distortion and enforce the justice he believes in, Ren proceeds towards the final battle along with the Phantom Thieves of Hearts.

Ren Amamiya, helping out at Leblanc, casually grabs a crossword puzzle magazine on the table. That’s when he finds the parting message “Proof of Justice” was left in the corner of the crossword puzzle with Akechi’s handwriting. In order to find the meaning of this concept, Ren takes a walk in the city under the winter sky, tracing his memories of Akechi. The meaning of his words soon become clear, and Akechi’s thoughts are…

On Valentine’s Day, Ren has a good time going out and having fun with girls. But will such fun times last…? Featuring the devilish Ren Amamiya, this is an original Valentine’s omnibus split in 11 different ways as open as the goddess of mercy’s heart.