キミイロパラサイト

"We won''t break this relationship for the rest of our lives." After a past incident, the high school boy Sakaki lived his life subservient to his childhood friend Nishi. Although he has accepted this relationship, Sakaki still felt uneasy about it. While Nishi wanted to monopolize Sakaki all to himself, Tachibana appeared between them. It seemed like she wanted to get closer to Sakaki... This is a triangle love story of overlapping feelings... (Source: Kodansha, translated)