help me find this manhwa!!

hello i have read a manhwa back in 2018 if i remember correctly.
but i forgot the name of it!! help me find it:
i remember the top being some sort of angel that can also transform into a bird, i think it was a school setting? not too sure..and if i remember correctly he wore white clothes and his hair was black..i know i may not be so descriptive but i hope someone recognized what i mean #－.－)