My friend's mother

It's been a few years since my husband passed away. Nobuko is a mother who raises her son on her own. It sometimes gets lonely, but the cheerful and honest son Yosuke and his best friend Shunichi supported me. However, at some point, Shunichi stopped appearing. When I asked Yosuke, Nobuko was left alone and couldn't get the point, and secretly summoned Shunichi... When Nobuko learns the reason, she puts a certain plan into action to reconnect the two's friendship.