Gekkou
Gekkou is an anime studio credited on 4 titles that OtaHub has profiles for, including Everyone's Darling Has a Secret, Koko wa Ore ni Makasete Saki ni Ike to Itte kara 10-nen ga Tattara Densetsu ni Natteita, Mayonaka Heart Tune. This page gathers those profiles with OtaHub scores where a full review exists, plus related articles.
Gekkou is an independent Japanese animation studio founded in December 2017 and based in Shinjuku, Tokyo. It has worked on TV anime such as Grandpa and Grandma Turn Young Again and Demon Lord, Retry! R.
Sources: Wikipedia: Gekkou (studio)
Everyone's Darling Has a Secret
Koko wa Ore ni Makasete Saki ni Ike to Itte kara 10-nen ga Tattara Densetsu ni Natteita
Mayonaka Heart Tune
Yuusha Party ni Kawaii Ko ga Ita node, Kokuhaku shitemita