Was Natsuki's first love, Atri? His beautiful childhood memories are gradually being overwritten. Despite his unwillingness to admit it was her the facts around him are lining up to force him to, but he continues to deny it. 
Does it make you that 
happy if I have a heart?
هل يُسعدك أن يكون لديّ قلب؟
Macht es dich so glücklich,
dass ich ein Herz habe?
¿Tanto te alegra que tenga corazón?
¿Tanto te alegra que tenga corazón?
Ça te rend si heureux que ça
que j’éprouve des sentiments ?
Sei davvero così felice
Eu ter um coração...
Вы так рады, что у меня есть душа?