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Tear Jerker: Chiisai Shoppu
The final 3 chapters. For starters, Hikari gets amnesia and believes that Orin is her lover, much to the dismay of a downhearted Shohei, and then, he gets a nightmare of Hikari II planning on eating the souls Mr. Gardenia and Hikari, the former actually happening later on, and the biggest one is when Shohei sacrifices his soul to Hikari II to save Hikari.