Whether she likes it or not, Sagiri can’t have Masamune all to herself, not matter how adorably she dresses. And though he technically rejected her, the fact Masamune compares Sagiri’s yukata to Muramasa means she’s still in his thoughts, because she was the first person to say what she said about his novels.
Elf also tries to nab her share of Masamune’s attention by dressing like Muramasa; in her case, a school uniform. But despite the fact she and Muramasa are rivals in love and novels, Elf offers the advice she’d offer Masamune even if she didn’t like him: stop worrying about what may or may not be, and have one little chat that settles it all. Of course, she’s clearly not happy at all when he says he wishes she was his big sister.
She is, right, however, that being direct with Muramasa is the best strategy, as her feelings for him haven’t changed since he turned her down, nor is she too uncomfortable to attend the short story competition wrap party he’ll be hosting. They also both acknowledge that they’ve only met each other three times—not enough to get to know each other—and so would both welcome a fourth, fifth, and more.
The fifth wheel, Shidou, arrives first, and has no idea what he’s walking into until Elf and Muramasa arrive at the same time and start immediately fighting over Masamune until Sagiri starts pounding on the floor above them. Elf is also sporting her most ridiculous outfit yet – a frilly lolita-style yukata and flamboyant hairstyle.
The initial awkwardness of the party eventually smooths out, especially when Masamune breaks out all the festival themed food, hoping to create a festival-like atmosphere for Sagiri, who can’t go outside. Everyone shares their ultimate dreams, including “Eromanga-sensei”, who says she wants to be the bride of the one she loves. Oh, girl…
After everyone else files out to go see the fireworks, Masamune stays with Sagiri, and confesses that he’s always been afraid of being alone ever since his birth mother died in an accident. He’s also truly thankful for Sagiri, his new family, for putting up with such a pathetic brother, but she feels no less pathetic for losing the will to leave the house.
As they watch the fireworks from the window of her room, Sagiri reiterates that she never considered Masamune family or her brother; her love has always leaned more towards romance, insomuch as she knows what that is.
Still, if Masamune wants or needs her to just be his little sister, she thinks she can “pretend…for a bit”, only to later remark somewhat ruefully to herself while lying in bed how she’s “gotten much further away”, presumably from her dream of being the bride of the one she loves.
I dunno if that’s a bad thing, Sags! Get over him, get out of that bed, that room, that house; go to school, meet someone whose father didn’t marry your mother. Is that so much to ask?
P.S. Kuroneko Sighting. Repeat: Kuroneko Sighting!!! With her adorable sisters too. That confirms Masamune, Sagiri, & Co. live in the same world as Oreimo, whose MC also had to grow a spine and pick someone, anyone, as long as it wasn’t his damn sister. Obviously, Kuroneko was his best choice.