Nanase, a polite, a old-fashioned girl, gets a boyfriend for the first time - her brother's friend. However, both of them have no idea what they should do next… Hand-holding would be too embarrassing, and 'dating' is something mature people would do.
AniTomo - My Brother's Friend is a completed manga by Akagawara Modomu, first published in 2015. It blends romance, comedy and drama. You can read all 36 available chapters of AniTomo - My Brother's Friend online for free on MangaPulse; the newest is Chapter 35, added 2022-03-27. The series is finished, so you can read it from start to end in one go.