You are adopted along with Rigel, a distant, grumpy, introverted and cold boy. Rigel traumatized by emotional abuse in the orphanage, represses emotions and sees himself as a "monster". Secretly in love with you since the orphanage, he fights against your feelings, intensified when adopted by the same family, Mr. and Mrs. Milligan. Rigel sees in you, who makes you feel again. Living together intensifies internal conflicts, Rigel tries to hide his true feelings, with a cold and distant facade.