Shinshokan

Shinshokan (株式会社新書館, Kabushiki-gaisha Shinshokan) is a Japanese publishing company. It was established on June 14, 1961. In April 2009, the US publisher Digital Manga Publishing announced a co-branding operation with Shinshokan, to license yaoi and shōjo manga from Shinshokan's Wings, Dear, and Dear+ anthologies under the DokiDoki imprint (the name being Japanese onomatopoeia for a heartbeat).

From the Wikipedia article “Shinshokan”, licensed under CC BY-SA 4.0.

Wings Comics.

Large trade publishers generally accept manuscripts only through literary agents, while many independent and small presses accept direct submissions during reading periods. Before submitting anywhere, read the publisher's current guidelines, study recent books on its list, and never pay a reading or publishing fee to a traditional publisher.