Astray in a Dream - S1.E5

Yumeji and Merry go grocery shopping, where Yumeji learns that Merry had apparently arrived in the real world about 10 years ago. They later meet a girl named Yui Kōnagi, with Yumeji helping her rescue a doll she dropped. Yui, who is actually the willing vessel of a dream demon named Engi Threepiece, has her trigger a daydream within which Yumeji and Merry are caught him. Engi questions them about someone named Pharos Hercules, before beginning to fight with Merry. As Merry talks about sending Engi back to where she came from, Engi reveals that there is no way back for dream demons, revealing her sister was killed when she entered the real world. Questioning whether she has actually been doing the right thing, Merry is unable to fight back against Engi, forcing Yumeji to stand between them, receiving a slash to his chest.