Hikaru ga Shinda Natsu 2 (Kadokawa Comics Ace)

[Machine Translation] If they look the same, they feel the same, don't they? Yoshiki and Hikaru are two boys who have grown up together in a village. One day, however, Yoshiki becomes convinced that Hikaru has been replaced by another "nanica. Hikaru," who looks exactly the same and is perfect. How was Yoshiki able to notice the switch? What is the truth that he is telling.... Furthermore, the people in the village are beginning to notice something strange and are starting to move.... This is the second volume of a work that has been the talk of the town on social networking sites. Included at the end of the book is a newly drawn manga that gives a glimpse into Hikaru's thoughts.

見た目が同じなら、同じに感じるん？ ある集落で共に育ってきた少年、よしきと光。 しかし、よしきはある日、光が別のナニカにすり替わっていたことに確信を持つ。 姿かたちは全く同じ完璧な「ヒカル」。 よしきは何故、すり替わりに気付くことができたのか。 彼の口から語られる真実とは…。 さらに集落の人々が異変に気付き始め、動きだしていて――。 各SNSで話題の作品、第2巻。 巻末にはヒカルの思考が垣間見える描き下ろし漫画も収録。