"She's All Grown Up" (childhood friend, who the hero hasn't seen in a long time, returns and much to his surprise, is stunning now. He realizes that his friend that he never thought of "that way" really can be thought of "that way")
and
"Victorious Childhood Friend" (Two people grow up like brother And sister, as best friends - and then, somewhere along the way, they realize that they love each other romantically. They may have always been just friends until puberty hit and their hormones did their thing, or someone may have had a childhood crush that was eventually reciprocated. They were friends when they were little and then they meet again years later after being separated and now, she is all grown up.)
(TvTropes

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