Suu Morishita is the shared pseudonym of a Japanese manga creator duo, consisting of Makiro, who is responsible for the original story, and Nachiyan, who handles the artwork. Their individual real names have not been publicly disclosed. Both members are originally from Miyazaki Prefecture and were classmates in high school. The duo began working together in 2009, making their debut with the one-shot Boku no Hoshi wo Kimi ni, which won first place in Shueisha’s 57th New Manga Seminar for the magazine Margaret. Early in their career, they also published works under the name Yamamori Suu.

Their first serialized series, Hibi Chouchou, was published in Margaret from 2012 to 2015 and compiled into 12 volumes. Following this, they created Shortcake Cake, which ran in the same magazine from 2015 to 2019 and also spans 12 volumes. In July 2019, they began their most internationally renowned series, A Sign of Affection (Yubisaki to Renren), which is published in Kodansha’s Dessert magazine and remains ongoing. This series marked their first work to receive an anime adaptation. In addition to their major serializations, the duo has produced several other works, including the short story collection Mada Amanogawa ni Ikenai (2011), the series Hoshokukei Heroine ni Ato Ichinen Inai ni Taberaremasu (2018–2020), and the one-shot Wakamen: The Mineral Boys (2020).

The 2024 anime adaptation of A Sign of Affection was produced by Ajia-do Animation Works, directed by Yūta Murano, and aired on platforms such as Tokyo MX and MBS. The story follows Yuki, a deaf college student, and her developing relationship with Itsuomi, a multilingual traveler, exploring themes of communication and connection. The series is noted for its careful depiction of sign language, with the creators conducting research through books, interviews with teachers, and consultation with a deaf supervisor to ensure authenticity.

The artistic identity of Suu Morishita is characterized by clean, elegant linework and a soft, emotive aesthetic that emphasizes subtle visual cues, such as body language and framing, to convey unspoken feelings. Narratively, their work focuses on character-driven romance and personal growth, with a strong emphasis on realistic, slow-building relationships and the importance of mutual understanding. A Sign of Affection, in particular, has been recognized for its sensitive and accessible portrayal of a protagonist with a hearing disability.

The duo has received significant recognition for their work. A Sign of Affection has been featured in major rankings, including placing ninth in the 2021 Kono Manga ga Sugoi! guidebook for female readers and receiving nominations for the Kodansha Manga Award in the shōjo category for multiple years. The series also won the grand prize at the 11th an·an Manga Awards. Their consistent publication history with major publishers Shueisha and Kodansha, along with the international success and anime adaptation of A Sign of Affection, establishes Suu Morishita as a notable and influential presence in the contemporary shōjo manga genre.