The official Twitter account for Kanojo mo Kanojo, by author Hiroyuki (Aho-Girl), revealed that the manga will be getting an anime adaptation in 2021.
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㊗️『カノジョも彼女』
TVアニメ化決定！！
＼2021年放送予定！
続報をお待ちください！！▼第1話は無料公開中です！https://t.co/MqWORVbDUM pic.twitter.com/wTngKfUNvJ
— 『ドリーム⭐︎ジャンボ⭐︎ガール』(ヒロユキ先生作品)公式 (@hiroyuki_comic) November 16, 2020
Synopsis
Naoya confesses his feelings to Saki, the girl he's loved for years… and she accepts! However, one day a girl named Nagisa confesses her feelings to Naoya. Although they get along well, Naoya has a girlfriend. Nagisa promises to confess to him again someday, but Naoya suggests they both go to Saki and ask if he can date both of them at the same time. Saki and Nagisa hit it off immediately, and while Saki was angry and reluctant at first about the idea, she eventually agrees.
The romantic comedy manga by author and illustrator Hiroyuki has been serialized in Weekly Shonen Magazine 's Kodansha since March 4th, and currently has 3 volumes.
Source: Kanojo mo Kanojo Twitter