Wow this is... Really nice.
I love Sousou no Frieren, which is a series about life after the adventure, when all your friends are gone and you've yet to live another lifetime. This feels very similar. It starts off as a "Ha ha sword art online'd" series, but man, it's very emotional. Chapter 34 struck a cord with me. I really like it. I feel like people critique it too harshly because of the "Most powerful" cliche, while I feel like it does it at a level where it's still very enjoyable and doesn't take over the story completely. There's nothing wrong with something popular if it's good, after all.