My ex-girlfriend showed up after several years with a child. "This is your child"... No way, that's a lie, right?

Tachibana Yusuke's ex-girlfriend, Sakashita Sakura, whom he dated in his student days, arrives at his home. ……Along with a 5-year-old child. While pointing at the child, Sakura tells Yusuke, "This is your child." ※This is also posted on Kakuyomu.