The manga Ijiranaide, Nagatoro-san, work by Nanashi, is published every two weeks. Thus, chapter
149 will be published on April 29, 2024 (April 30 in Japan).
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You can read the manga legally at
Magazine Pocket
(Japanese),
BookWalker
and
Kodansha.
The webmanga was first published on November 1, 2017 on the Magazine
Pocket website. And, currently, 19 compilation volumes have been
published.
In addition, the work received an anime adaptation that premiered on April
10, 2021 and could be watched on Crunchyroll. It also had a second season
that premiered on January 7, 2023.