YOU SAID:

me when i see him clapping somebody else's cheeks

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彼が誰かの頬を叩いているのを見たときの私

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Me when I see him smack someone's cheek

INTO JAPANESE

彼が誰かの頬を叩くのを見たときの私

BACK INTO ENGLISH

me when i see him smack someone on the cheek

INTO JAPANESE

彼が誰かの頬を叩いているのを見たときの私

BACK INTO ENGLISH

Me when I see him smack someone's cheek

INTO JAPANESE

彼が誰かの頬を叩くのを見たときの私

BACK INTO ENGLISH

me when i see him smack someone on the cheek