More than a Married Couple, but Not Lovers Volume 1 by Yuki Kanamaru

[UDON Entertainment] "Would you take an oath for a false romance, for the sake of true love? The pseudo-married couple romantic comedy between a popular girl and a loser in romance begins! 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...!?"