The 4 girls come watch the basketball game that their Sasaki is a member of. Kana has been secretly in love with Sasaki, whom Haruko ends up making out with. This triggers Kana's NO to activate, but she notices that and runs away. 
Then I should check.
Lass mich das erst überprüfen.
Tendré que comprobarlo.
Tendré que comprobarlo.
Je dois m’en assurer
par moi-même.
Allora devo controllare per bene.
Então eu preciso conferir.
Что ж, не помешает проверить.