The story is nothing we haven't seen before. Classic Iseaki story. OP MC. Guy gets a Harem. ETC ETC ETC. However, this is a fun one. It doesn't try to be anything revolutionary, and the MC is a TOTAL BATTLE MANIAC. He traded his memories for double growth, and has wound up making a summoning pact with the goddess of the world ala konosuba. Its a fun Iseakai but nothing revolutionary. The story has no real plot at this point. Mostly classic HERO MUST SAVE THE WORLD. But our MC is not the hero, he is just an adventurer. So its more so MC dicksaround in another world looking to power up and looks for fights.