Loveless

In the midst of his tumultuous past, 12-year-old Ritsuka Aoyagi is left with his mentally unstable mother as his sole family after the sudden and mysterious death of his brother, Seimei. As Ritsuka navigates his new school, he meets Soubi Agatsuma, a mysterious individual who claims to have known Seimei. Soubi's connection to Ritsuka is revealed to be rooted in a unique bond, with Soubi serving as the "Fighter" paired with Seimei as the "Sacrifice". Following Seimei's untimely demise, Soubi becomes Ritsuka's "Fighter," and together they embark on a perilous journey to uncover the truth behind Seimei's death, which is shrouded in the enigmatic organization known as the "Seven Moons."