MTL - Poor Family - Chapter 7 , are not fuel-efficient lamps

Zhou Yu, a reclusive otaku, who did not like to go out of his house, was one day forced out of his house by a series of unexpected events.

- Description from Novelupdates

This is the story of a young slave gladiator in an underground arena. He doesn’t know about his past or how he got to where he is, only that his name is Aegir, and that he is strong.

The world was once at war with 10 alternate worlds. This was known as the Concept War and our world won 60 years ago. All of this was concealed so no normal people are aware of this fact in the current time.

After the death of his grandfather, the high-school student Sayama Mikoto is suddenly summoned by the giant corporation IAI. He learns this world is headed for destruction due to the acceleration of the Minus Concepts. To prevent this, negotiations must be undertaken with the survivors of the other parallel worlds so their 10 concepts can be released.

And so Sayama is caught up in the final battle to clean up after the Concept War which left behind so much enmity.

Saintess wants to turn me into a sword spirit; the master wants me to be a rebel disciple; the blindfolded sword fairy senior sister wants to make me her slave; the fox from Qingqiu harbors ill intentions; the little dragon girl always drools over me; the princess wants to keep me in the deep palace...All I want is to cultivate immortality, so why do they always have designs on me!? Many years later, someone asks Lu Jin'an what kind of Dao heart supported him to get this far? Lu Jin'an glances at his charming and alluring wives and sighs faintly：“I just wanted freedom.”