The artist (credited as Yamamoto Akira for this specific series) uses:
Because normal is gone.
This is a shorter, punchier read. A husband swaps with his wife's best friend. The twist? The best friend has been in love with him for years. Modorenai Yoru shows a mutual mistake; Ane no Yuujin shows a calculated trap. The "best" aspect here is the dialogue—every conversation drips with double meanings. fuufu koukan modorenai yoru manga best