Return of the Dragon Slayer

What is luck exactly? Is it just some random possibility calculated from the universe when someone is born or is it like currency in which you can spend however you wish? What is fate? If someone is fated to be something, does that mean freewill truly is an illusion? Is fate kind or cruel, does it pick a side, does fate punish those who don't deserve it and award people that do? Just two out of the hundred of the constant enigma's that every living being thinks about since the dawn of creation.
Those two constant enigma's surround a certain brown haired teenage boy named Issei Hyoudou, an average highschooler who is also the current Sekiryūtei and pawn of Rias Gremory. A day after Riser's defeat Issei realizes that his victory over the third son of the house of Phenex was by sure luck and begins to feel that his luck will soon run out. Beginning to feel frustrated at himself for being weak and wanting more power in order to protect what he cares about is enough to awaken the legendary wielder of the boosted gear who is even stronger than both the "official" strongest wielders of the boosted gear. Now with the new fiery determination to become the strongest will Issei become the crimson inferno that he was meant to be or a great disaster waiting to be unleashed. Either way the brown haired boy will slay all who threaten him and those he treasures.
(Remastered version of the Return of the Dragon Slayer)
A/N: I don't own Highschool DxD and the pictures/videos used in this story.