Forgotten Title Dying art(?)[BL]

I forgot what the story’s detail and only remembered that the MC was world hopping with a system. The mission was to die artistically (?) beautifully or so.

Arc 1: He died from shielding ML in the mission world (he was frozen gracefully... and the ice broke, he died)

I remember that much and I think I read to the arc he has the SSS strength or something. It’s ABO world.

 

Heroic Death System maybe?

 

Oh yes, that’s the one. Thank you so much!!!