More than a Married Couple, but Not Lovers Volume 1

"Jiro Yakuin, a high school student who lacks romantic experience, is paired up with a completely opposite girl, Akari Watanabe, as part of a class called 'Marriage Practical'. They are required to live together and act like a married couple in order to earn the right to exchange partners with their crushes. Reluctantly, they begin their performance as a married couple, but can they handle what awaits them.. "-