I have an Apocalypse City - Chapter 22 - : Is the Supermarket This Realistic Too?

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

Since Suri disappeared, smiles and laughter seemed to have disappeared from the Clarke family home. Christian, who feels responsible for the disappearance of his younger sister, turns into a terrible figure, all ways and efforts Christian do to find his sister. In his search, Christian accidentally meets a girl who manages to return laughter to him. As his feelings deepen for the girl, Christian must be faced with a painful reality that makes him have to choose to continue his story or end it.

Elena Wilson, an ordinary girl who has a simple dream turns out to have many secrets. What is that secret? Was he the one who saved access to find Suri?

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

Forge unparalleled mechs with the ambition of old age, and use the galaxy as a knife to smash the edge of the empire.

His name is Ji Xinghe. When he was 65 years old, he went to Alien Battlefield to avenge his son.

The old man is standing on the ground, his ambition is a thousand miles away, the old man wears armor, and fights to the galaxy, the old man drags his sword, it is not for glory.

- Description from novelbuddy