Adults Who Don't Understand Love (Pre-Serialization)

Massu (real name: Akiya Masamura, age 27) and Jaja-san (real name: Sayo Kitamura, age 28) are gamer friends who have just started dating. The problem is that despite being adults, these two are as wet behind the ears as middle schoolers, and have zero experience when it comes to romance! So due to having been friends for many years, they now spend their days worrying about what they should do to be more like a "couple". And when the inexperienced Massu expresses his love to Jaja-san as straightforward and bluntly as possible, it always leaves her blushing in embarrassment! Source: Futabasha