Some character kissed a character to extract information/get into her memories. I forgot what scene and episode though. And time.
http://battlevixens.wikia.com/wiki/Gakushin_Bunken
http://www.animeshippuuden.com/ikkitousen-dragon-destiny-8/ somewhere like 5 minutes.
Now to find the manga equivalent.
http://www.mangahere.com/manga/battle_vixens/v11/c000/34.html
http://www.mangahere.com/manga/battle_vixens/v11/c000/53.html
http://www.mangahere.com/manga/battle_vixens/v12/c000/66.html