Episode 9 of (Astarotte no Omocha!), titled "Slight Fever Backslash," is widely remembered as the "swimsuit episode," blending the series' characteristic ecchi elements with a rare moment of emotional vulnerability for the protagonist, Naoya Tohara. Episode Plot Summary
: Naoya begins acting strangely, showing signs of extreme irritability and physical exhaustion, which the characters jokingly refer to as "harem sickness" or frustration.
The episode centers on a trip to a massive indoor pool resort within the demon world. While it serves as a typical fan-service showcase, the narrative focuses on a sudden change in Naoya's behavior.
According to Anime News Network , the creative team behind this specific episode included: : Toshikatsu Tokoro. Script : Hitomi Amamiya. Animation Directors : Jun Hanzawa and Shou Sugai. Eyecatch Illustrator : Hiro Kanzaki.