Nanomancer Rising: Divine Alchemist Reborn as Academy's Worst Teacher - Chapter 7:

Instead of struggling meaninglessly, he acknowledged his place.

Following a regrettable teleportation gate incident, freshly graduated spatial mage Tila found himself in a strange bipolar world. On one side are the sexless humans, completely isolated from the rest of the world inside their domes. On the other side lies the bustling outside world, composed of a myriad of non-human species.Should he focus on the humans and teach them a thing or two about their bodies? Or should he mingle with the spirited outside species?Of course, he shall do both, by becoming the sole true interspecies trader!

I am Supreme

The 7-year-old little crybaby met 11-year-old big brother who ran away from home.
[This man became the protector of redemption in his life]

The 16-year-old little dragon fell in love with a 20-year-old big brother.
[It’s a pity that the big brother didn’t recognize him as the little crybaby]

The 23-year-old single father and 27-year-old chief executive meets again.
[This time the little crybaby and his big brother are finally together]

Fortunately we met through hundreds of millions of people, Thank God, for letting us break through many obstacles and get back together again, falling in love with you and being with you again is the greatest fortune in my life.

- Description from Novelupdates