I want to be by your side and bring happiness to mom Vietsub

After her husband passed away, Yui lived happily with her son. But one day, Tatsuya saw his best friend doing immoral things to his mother. From then on, something seemed to arise inside him. He decided at all costs to do that with his mother. At first, Yui firmly refused, but due to a long-term lack of affection, she gradually favored her son and actively wanted to do it with him...

I want to be by your side and bring happiness to mom Vietsub