The Eternal Ending

Timothy bryn a gifted young man who had live his life as invisible.
Blaming himself for his mothers death. living as an outcast while having the title of a 'murderer'. everyday is like hell until he decided to take his own life, but then
[ The skill 'requiting' has been offered, would like to accept and requite?]
"Huh" an unknown voice was heard in his head," requiting?" He was quite doubtful at first but "i accept" [ the skill 'requiting' have been given, you will now 'live' a different life than before].

And he did live differently he was no longer invisible. he was transferred to another world to perform his 'duty'. He was happy.....
Until everyone he cares for in that world died... He killed himself again and again but he just continued to be transmitted into a new world."i want to die" that's what he only wished for. He believes that if he continue to requite he'll be able to get the death he wished for but then the 51st transmigration come. Like his other life he plans to complete his duty without making any connections but "is this Earth?" He was back to his homeland. He was confused, the earth he remembered is completely different, there was catastrophe, the beings he fought in the other world has come to his homeland destroying the city and killing the people. In this world where his mission is to save his homeland there was a peculiar being that caught his attention "you must've had suffered a lot" "I'll give you the death you want" "but you need to help me save this world". In this transmigration Will he finally get the death he longs for..