[DeepL Translation - needs review] Volume 1 Introduction: Subaru and Kazuma are twins in the third grade of elementary school. On Subaru's birthday, his classmate Mana and three others bring him a present. However, their real target is not Subaru, but his twin brother Kazuma. However, Kazuma is hospitalized and not in good condition, so Subaru is reluctant to let them see him. Mana and her friends go to the hospital room to see Kazuma, who is suffering from memory loss due to a brain tumor a...
