Mysterious Cultural Festival (S01E11)

Ayuko attends the festival with Kouhei but soon notices Akira with Aika and decides to follow them. As Akira struggles to fend off Aika's advances, Mikoto suddenly appears in a quirky robot costume, proposing a blind taste test of their saliva to determine who Akira prefers. Akira ends up with a nosebleed from Mikoto's drool, as she is surprisingly unadorned beneath her outfit. Aika, feeling vulnerable, removes her clothes to share her drool but breaks down in tears, revealing her pursuit of Akira stems from heartbreak over her ex. Mikoto comforts Aika, sensing her unreciprocated feelings. Just then, Akira's blindfold slips, exposing the girls, leading to a flurry of slaps. As Akira and Mikoto depart, she hints that her first kiss will be with him, leaving him grinning after tasting her drool.