No_Frog
(All characters are pro heros around 20)
Katsuki watched as his world fell apart, every chance he ever had slipped from his grasp, and every little glimpse of hope faded away. Tears formed in his eyes and all he wanted to do was run away and cry. Cry about how pathetic he was for the way he felt towards a now engaged man...
Kirishima proposed to his girlfriend of 4 years, Ashido Mina.
...
A story in which Bakugou and Sero help each other cope with their unrequited love and end up falling in love along the way.
(Bakugou loves Kirishima and Sero loves Mina)
But happy endings don't just happen.
And it's even harder when the world seems to be against you.