Yuki Sanada is the socially-challenged main protagonist of the series. When afraid or nervous, he freezes in place, unable to breathe and feels like drowning – which somewhat resembles like making a demonic expression that tends to scare away any and all potential friends he may had in the past. Due to his grandmother’s work, he tends to move from place to place not giving even the slightest chance of making friends. He later befriends an self-proclaimed alien Haru, the Enoshima native and fisherman Natsuki and the peculiarly weird Indian, Akira.