Rei Kiriyama is a child prodigy. Rei Kiriyama is also an orphan who lives alone in an empty apartment. Rei Kiriyama is a teen working in an adult's world. Life is complicated for Rei. He's an up-and-coming shogi player on the verge of turning pro, but he has no homelife, or much of a life period,outside his board game, but thankfully with the help of some life-long friends he has an opportunity start all over again.
 
(Source: DENPA)
 
Notes: 
- Winner of the Grand Prize at the 4th Manga Taishou Award in 2011. 
- Winner of the 35th Kodansha Manga Award in 2011. 
- Winner of the Grand Prize at the Tezuka Osamu Cultural Prize in 2014. 
- Winner of the Grand Prize at the Japan Media Arts Festival in 2021.

Rei Kiriyama is a 17 year old boy who recently started living alone, financed by his salary as a professional Shogi player. Despite his independence, however, he's yet to mature emotionally, and his problems continue to haunt him in his daily life. His relationship with his adoptive family is strained, and he has difficulties interacting with his fellow high school students. 
 
Meanwhile, his professional career in Shogi has entered a slump. Burdened with the heavy expectations placed upon him, his wins and losses are fluctuating as his record and progression into the ranks begin to stagnate. 
 
Acquainted with Rei are the three Kawamoto sisters: Akari, Hinata, and Momo. Unlike Rei, they live happily in their modest home, which they warmly welcome Rei into as if he were one of their own. He frequently visits the family, interacting with them and receiving the kind of care and affection he never quite had while under his foster home. 
This is the story of Rei's triumphs and failures, relationships new and old, and his growth as a person. 
 
(Source: TV Tropes)

The second season of 3-gatsu no Lion. 
 
Now in his second year of high school, Rei Kiriyama continues pushing through his struggles in the professional shogi world as well as his personal life. Surrounded by vibrant personalities at the shogi hall, the school club, and in the local community, his solitary shell slowly begins to crack. Among them are the three Kawamoto sisters—Akari, Hinata, and Momo—who forge an affectionate and familial bond with Rei. Through these ties, he realizes that everyone is burdened by their own emotional hardships and begins learning how to rely on others while supporting them in return. 
 
Nonetheless, the life of a professional is not easy. Between tournaments, championships, and title matches, the pressure mounts as Rei advances through the ranks and encounters incredibly skilled opponents. As he manages his relationships with those who have grown close to him, the shogi player continues to search for the reason he plays the game that defines his career.

The story is set in the year Showa 44 (1969), and it centers around Takanori Jinguuji, the 27-year-old man who eventually become the head of the Japan Shogi Association in the main 3-gatsu no Lion series.

Takemoto lives in a run down student apartment, where his greatest worry is when he'll next be able to afford to eat meat and whether he'll get to class on time. Although he's away from home and living on his own, Takemoto is far from finished growing up. Along with his crazy cast of friends, Morita, Mayama, Yamada, and Hagumi, Takemoto sets out to discover life and his true self.
 
(Source: Viz Media)
 
Notes: 
- Won the the 27th Kodansha Manga Award for shoujo in 2003. 
- Chapter count includes 11 extra chapters.

A 10 episode special teaching each piece of shogi.

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