For the Very First Time There I See, Someone With the Same Pains as Me.

Tony Stark and Loki Odinson meet on a rooftop, find out they're pretty similar, and become friends :) (NOT A SHIP)

Spoiler like TW-

CHAPTER 1

there is a mention of suicide
There is an implication of someone about to commit suicide (Loki wants to but Tony stops him right on time)

CHAPTER 2

There's a scene where Loki is very injured
There is a scene where Tony is being abused by Howard stark, and there's a scene where it is mentioned and where the injuries are cleaned.