Until We Become A Family

Until We Become A Family summary:

30 years old, unmarried and cohabitating with his lover. That's how it was until yesterday... Due to certain reasons, Oujirou has been keeping the fact that he's living with his lover a secret at work. One day, his sister suddenly came with her children to see him for the first time in 10 years. Oujirou reluctantly let them stay over at his place after his sister insisted that they stay the night there but he woke up the next morning only to find that his sister had suddenly disappeared, leaving behind only a small amount of money and her two children... A couple with special circumstances and a pair of siblings with special circumstances themselves. This is the trouble-filled story of them living together.