Oregairu:Zero

Yukinoshita Yukino is saved by a boy in her greatest hour of need. Circumstances break them apart, but his ideals are left deeply imprinted and Yukinoshita vows to save all those who need help. However, by chance or fate, they meet again years later, yet she can't help but feel that the apathetic boy before her is only an insult to the hero who saved her so many years ago.