MTL - Season Division - Chapter 27 stand up for me

Second Awakening? A System? Having lost the battle of the Dark Catastrophe to the demons—spawns of the Dark Gods— humanity is given a chance at making things right once again. Born as a twin into a family of high ranking talent awakeners, Damien Terrace is met with trouble when it is his turn to perform the ritual. After awakening the E-Rank Summoner talent, Damien loses everything to his twin. Exiled by his father to perish away from them, Damien goes through a second awakening that changes the play field for him. Ding! [The God of Summons is furious and has blessed you with a system!] [You have fused with the Mythics Summoning System—A system that only allows you to summon mythical beasts!] [Obtain nineteen Magic Essence Cores to boost your core to the next level!] [Slay 200 more demons to unlock another summon!] Damien’s only option is to evolve!

The person whom the world revolves around.

On the eve of the millennium, a sixteen-year-old Chinese boy left his hometown and came to Europe just to play football to support his family.

But he didn’t expect that an adventure would make his football career unique from then on.

Twenty years of ups and downs, he has won countless honors, looking back, Ronaldo, Zidane, Ronaldinho, Ronaldo, Messi, Mbappe and many other stars are all shining, But there is only one king of the ball, hanging high in the sky like the sun, shining forever!

(No system, talent improvement + hard training)

- Description from novelbuddy

Another entry in what you can call the Proto Harem Series: the books written before the Harem Series that take place in the same world.

It’s about a swordswoman whose student is captured, so she goes to rescue her.