Responses
The novel translation hasn't completed yet. But i'll give u a link to that
https://archiveofourown.org/works/28126470
Here's the link:
http://www.tunwalai.com/v2/story/328316
This version is in thai but you could still understand some parts of it with auto google translate. (Searched high and low for this link when this manhwa was first uploaded, only found it through fb)

Spoil
Daiki has real feelings for Minjun, he is simply doing this because he doesn't want Minjun to end up like Toma's mom. Daiki still feels guilty for Toma's mom because he thinks that he is the reason why she had died so early.
For future chapters, Daiki pushes away Minjun and gets him a house that Daiki himself doesn't know the location. There was a lot of crying on Minjun's part while Daiki was depressed for days. Also Daiki neglected Toma for a bit because his state was unstable and he knows that Toma will just keep asking where his Mama(Minjun) is. But then Toma gets sick with pneumonia, he is rushed to the hospital where he looked so weak. Daiki saw his poor son suffering and he felt much worse. Kenta knew that Toma really needs Minjun so he fetches him from the house where Minjun lives. He got Minjun and they got back to the hospital. Weak Toma wanted to open his eyes as wide as he can because he can hear his Mama's voice. Minjun comforted Toma and says that he won't ever leave him again. Minjun saw that the little boy dropped some weight because he didn't eat much. He asks what Toma wants to eat and he replied that he would like fried shrimp. They get him fried shrimp and they later on went to sleep. Daiki walks into the room where he saw Toma laying on Minjun's chest, sleeping soundly. His condition improved drastically after Minjun arrived.