Wife Returns, Part 1

Risa and Kota are barely surviving on the money their parents left them when they died. Emotionally clingy Kota often bothers Risa with phone calls. One day, she gets fed up and blows up on her brother; Living apart from his wife, Sumida returns to his supposedly empty home, but hears a noise. Assuming his wife has returned, he goes to the kitchen where he finds his ex-lover Airi.