Strawberry Panic!/Awesome

"Shizuma: NAGISA! I love you!"
 * There are loads of these in the light novels:
 * Chikaru
 * Amane and Hikari
 * When Nagisa and Shizuma's romance seems utterly broken beyond repair, with the latter deciding the study abroad and even having been proposed to by royalty, Nagisa refuses to give up and chases her all the way to the airport, desperately trying to convince her to return to Miator.
 * Nagisa performs a Heroic Sacrifice in one of the earlier Etoile tests, saving Hikari from a nasty fall, even at her own expense. It's stated that in the worst-case scenario, she could have been trampled to death.
 * In the anime:
 * Shizuma bursting in during the finale, pulling a Speak Now or Forever Hold Your Peace (even though it's not an actual wedding.)