同居人はひざ、時々、頭のうえ。 is a 6-book series with 6 primary works first released in 2015 with contributions by Tsunami Minatsuki and 皆月つなみ.
2015 • 1 Reader • 156 pages • 3
2016 • 1 Reader • 160 pages
2017 • 1 Reader • 160 pages
2018 • 1 Reader • 160 pages
2018 • 1 Reader • 192 pages
2019 • 1 Reader • 162 pages