----------------------------------------------------------------------------------------------------------------- Eruru goes to the Beach with Ore-kun (self-insert) after he hears Eruru never went to it in her home world, as a forest denizen and high-grade slave prostitute for Orcs she never had the chance before; since Eruru's personality is a mix of an innocent yet extemely lewd Elf due her intense training as a sex slave, she picks a very lewd bikini, she is very proud of her high grade status as the "meat princess" of Moss Elves (a race, separate from High Elves).
Everyone at the beach takes glances at her, Eruru details with imagery of her sister how a Moss Elf like her who has Orc Blood in her veins are very sought after by Orcs, her pheromones make them want to violate elves like her on sight, as a slave she wouldn't be able to refuse, this makes Ore-kun kinda jealous but Eruru was only actually telling him this to remind him to protect in case her pheromones make men at the beach go wild, well it made Ore-kun jelly of other Orcs ever touching her, so he bizarrely morphs into one (it is ambigous if he literally did it, or if it is a visual representation of his desires but Eruru can tell something in Ore-kun changed, a plot thread is opened so it could be something deeper).
Eruru offers herself to calm Orc-Ore-kun down, they have a at it, and once finished it Ore-kun looks human again and they do question if something might be happening to both of them, but before Ore-kun presents his suspicions a new otherworldly visitor seems to be coming, Ore-kun comically remarks isn't this an eromanga, why is this plot happening? The visitor makes cryptic remarks, wondering if something to do with the reincarnation magic resulted in loss of memory for one of them. THE END
* The silloutte might imply the woman is Eruru's sister, it does look like the visual image of Eruru's explainatipn orgy, but only the sequel can tell it for sure.