Dive into your creative stream
the difference between till at the start of round 6 and round 7
he doesn't seem like he's trying at all during round 6, having already fully given up living after losing mizi
but in round 7, even though he's lost even more, he's clearly putting all he has left into it
and the reason for that... has to be ivan, right?
he must have recognized ivan sacrificed himself for him, so for the sake of ivan's feelings till tries his absolute best to respond to them and perform that till sings at all here is for ivan
...but at the same time ivan is what haunts him
obviously, right? there's no way watching someone you were so close to you die like that right in front of you can give you actual "strength" (and this isn't even getting into the kiss...) contrary to ivan's (clearly wrong) conviction that till doesn't care enough for him to become a trauma to him, that's exactly what happens
this inextricable mix of love and hate, hurting and healing... this is the tragedy of their relationship to the end no matter how much ivan and till care for each other, they can't ever cure each other