YOU SAID:

what if we kissed and had a grand fun time but then someone ruined it because they were being an unfun no good poopy pants

INTO JAPANESE

もし私たちがキスをしてとても楽しい時間を過ごしたが、彼らが面白くなかったので誰かがそれを台無しにしたとしたらどうでしょう

BACK INTO ENGLISH

What if we had a great time kissing but someone messed it up because they weren't funny?

INTO JAPANESE

私たちがキスをするのに素晴らしい時間を過ごしたが、彼らが面白くなかったので誰かがそれを台無しにした場合はどうなりますか？

BACK INTO ENGLISH

What if we had a great time kissing but someone messed it up because they weren't funny?