Azumanga Daioh, episode 4. When Yukari dives into the pool,
Magical Shopping Arcade Abenobashi, episode 8. Arumi and Sasshi
Strangely enough, in the manga version of Ikki Tousen (titled
Milk Junkies.
Nogizaka Haruka no Himitsu. Ruko is the brunette, Yukari is
Dinner Time