I Become The Strongest Hero in Another World

I BECOME THE STRONGEST HERO IN ANOTHER WORLD! This Story is about a 30 year old Male named Kira Reincarnated to a another world. he died due to his sickness. he lives alone because his parents left him while he was a child. no one wants to care about him. that's why he decided to live on her own. but at the age of 25 he found out that he had a cancer. After 5 years he died. he thought his life is done now. but when he woke up he was shock that he looks younger like a 15 year old himself. what kind of adventure will kira take? Read the Story to Find Out!