Saenai Heroine no Sodatekata (冴えない
A spin-off manga titled Saenai Heroine no Sodatekata ~egoistic-lily~ (冴えない彼女の育てかた〜egoistic-lily〜) is illustrated by NEET (にぃと) and focuses about Eriri. The manga was serialized on Kadokawa Shoten's Young Ace, from its March 2013 until June 2014 issues, collected into three tankobon volumes.
Another spin-off of the series is titled Saenai Heroine no Sodatekata: Koi Suru Metronome (冴えない彼女の育てかた 恋するメトロノーム), setting Utaha as the protagonist and Tomoya as her sidekick, and has different story from the main part of the light novels. The manga is illustrated by Sabu Musha, currently being serialized on Square Enix's Monthly Big Gangan starting the 2013 Vol.09 Issue.