MTL - I’m Working As a Renter In An Unfinished Building - Chapter 642 no wonder so calm

Protagonist travels between different anime worlds to right wrongs and uncover his reason for being along the way.

- Description from Novelupdates

Earth is dying. The sun is expanding at an uncontrollable rate, but Theo Spencer is alright with this. He's led a deplorable life. When the end comes, a mysterious entity grants him the gift of reincarnation. The gift of a quiet life as an alchemist.

Theo awakens in a small town in the southern reaches of a small kingdom in a non-human body. Broken Tusk doesn't seem like much, but his legendary alchemy skills will soon turn their fortune.

Join Theo on his journey to turn the swamp-town of Broken Tusk into a prosperous trade town.

A side story series featuring the girls of Kyoukai Senjou no Horizon.

Rihannan Alessin, a queen rotting in prison.

Despaired and without hope, she drank poison and died. But… unbeknownst to her, the deity gave her a second chance at life. She was twelve again. And this time, she would live life differently.

Six years later, she chooses to become Arundell’s queen…

“If you’re asking me to step down from the marriage proposal, I can’t.”

“Marry me and let us divorce after a year.”

And this time, the time limit of their marriage would last a year.

A husband she knew who was different than before… she tried not to love him again, but each time, her heart kept shaking.