During a routine check-up, Miia, Centorea, and Mero realize they've packed on the pounds from Kimihito Kurusu's irresistible meals. To shed the extra weight, Polt grants them exclusive access to her upcoming pool and gym facilities. Yet, what starts as a wellness journey soon escalates into a fierce competition among the trio. Meanwhile, Rachnera Arachnera receives a surprising invitation from her former host family, expressing a desire to make amends and bring her back into their fold. As tensions rise, the gang must rally to persuade the family's daughter, Ren Kunanzuki, to allow Rachnera to remain in Kimihito's care.