Kip. 10: The Kindness of a Man! Yuichiro, Heartbroken by Rei?

10

Worried by Rei's intensive meditation, Yuuichiro becomes concerned that she has fallen deeply head-over-heels in love for another man. When he sees her with Haruka, he is convinced that she is Rei's new romantic suitor. Not realizing that Haruka is in fact female and not in love with Rei he challenges her to a fight in the rain but she just keeps dodging and Yuuichiro keeps landing in the mud until Usagi points out that Haruka is female so he then plans to apologize to her. (Source: Sailor Moon Wikia, edited)