S-Rank Alchemist of the Tower [BL]

[On Hiatus, sorry for the wait!] It happened 15 years ago. [Congratulations to Humanity for completing the Tutorial Level!] [The Tower has now been unlocked. Players, please climb the Tower for abundant rewards!] The Earth suddenly went online. Humans awakened 'Blessings', a gift given by the Tower for those who wished to climb it. I lived a dull life inside the Tower, 10 years after being left for dead by the party I last signed with. However, now that I've come back to 15 years ago... I've decided, I will live my life just the way I want to! (Contains BL subplot. Cover is temporary, though it might end up becoming permanent.) (Cross-posted on Scribblehub.)