A Reincarnated Mage's Tower Dungeon Management - Volume 1, Chapter 5 – Creampie

The prosperity is about to come to an end, and the poor boy quietly rises.

Traveling across time and space, seek the leader of the world.

- Description from novelbuddy

The young lord of a small and weak country saves a dragon beside the sea one day.

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.

It is eight or nine years for her to meet her first love again. In the gas station of highway, she sees him walking from the grocery store. She looks at him, not believing what she sees and asks, ‘Do you still remember me?’ He looks at her, with a bottle of mineral water in his hand, and says peacefully, ‘Yes, even if you became ashes.

- Description from Novelupdates