Two friends and one sensitive tsun

Rinko was on the receiving end of Ako's tickle torture a few days ago and felt a bit grumpy with her since then, but Ako told her she would feel better after she tickle tortures someone else, and she will call her in next time someone is sent to be punished in the club. Turns out Kirino was sent to the torture room for trying to sneak into the manga booth and steal the newest volume of her favorite series during the festival, Ako immediately called for Rinko once it was all set up.

"Here she is, Rincchan." Ako shows her, "Oh no, not you again..." Kirino recalls Ako, growing desperate to break free. "So this is the girl who was caught stealing manga? She's pretty cute, not gonna lie." Rinko says as she looks at her, Kirino blushes and retorts "Shut up, get me out of here already! I learned my lesson!" which makes the two laugh. "Oh no, not at all. In fact, your lesson is about to start now..." Ako says as she licks her lips and moves in to tickle Kirino's armpits, Rinko then says "You know what? You're right, this is gonna be fun!" as she jumps right in and tickles the poor girl who was just barely hanging on with just Ako. "Hmm, I wonder what her armpit tastes like..." Rinko says as she gets closer, "It tastes bad! I swear, I was running around right n-AAAAAHAHAHA NOOOOOO!" Kirino's attempt at talking her tormentor out of licking her armpit proves to be futile. "No fair, I wanna taste her too!" Ako says as she licks Kirino's other armpit, the girl cackles and tries desperately to move around and break free, but the bonds are keeping her firmly stuck to the X frame, her upperbody at the mercy of Ako and Rinko.

"Hmm are your belly or your armpits more ticklish, I wonder?" Rinko asks, Kirino rapidly retorts "THEY'RE BOTH VERY TICKLISH, PLEASE DON'T!" but the girl's pleading is ignored as Rinko moves down, licking and tickling her tummy while Ako continues to focus on her armpits. The two completely wrecked Kirino's upperbody, leaving her a panting and giggling mess, then Rinko proceeds to stretch herself and Ako threatens to tickle her armpit, Rinko quickly lowers her arms and says "Don't you dare..." and Ako says "Okay, I can just tickle Kirino-chan instead, she's already tied up anyway..." as she slides her finger on her tummy, Kirino giggles and squirms "No, please, enough... AAAAAAH!" screaming and laughing when Rinko tickles her armpit for a bit.