Nezumi's First Love

Nezumi no Hatsukoi, ねずみの初恋, Le Premier Amour de Nezumi, नेजुमी को पहिलो प्रेम, O Primeiro Amor de Nezumi, El Primer Amor de Nezumi, Tình đầu của Nezumi

Nezumi is a girl who was raised as a hitman by the yakuza and grew up not knowing human love. An ordinary young man, Ao, knows nothing. They fall in love and start to live together, but the evil hand is close at hand...

Read the prequel oneshot featuring Messiah-chan's backstory here.