Complex sentence: The plot formula is similar to the Otoko wa Tsurai yo films, in which each time Momojiro falls in love with a woman (the "Madonna") and then ends up having to help her romance with another man.
Split into simpler sentences: The plot formula is similar to the Otoko wa Tsurai yo films. Each time Momojiro falls in love with a woman (the "Madonna") and then ends up having to help her romance with another man.