is a Japanese fantasy manga series by Daisuke Hiyama. It was serialized in Futabasha's seinen manga magazine Monthly Action from August 2017 to February 2024 before being transferred to the Web Action manga website, where it finished serialization in August 2024. It has been collected in fifteen volumes. The manga is licensed in North America by Seven Seas Entertainment. An anime television series adaptation by Wolfsbane aired from July to September 2020. A second season by Wolfsbane and Seven aired from October to December 2022.
Peter Grill, warrior of the Brave Swordsmen's Guild, has emerged victorious at an international fighting tournament and is crowned the strongest man in the world. Peter uses this victory to gain permission from Guildmaster Sanctos to marry Sanctos' beloved daughter and fellow Guildmember, Luvelia. However, women from other races have heard of Peter's exploits and seek the "seed" of the strongest man to continue their respective bloodlines, with or without his consent. Meanwhile, the Guildmaster's obsession with his own daughter drives him to find a way to end Luvelia's relationship, as Peter tries to hide his new lovers from them both.
Written and illustrated by Daisuke Hiyama, Peter Grill and the Philosopher's Time was serialized in Futabasha's Monthly Action magazine from August 25, 2017, to February 24, 2024. It was subsequently transferred over to the Web Action manga website, where it finished serialization on August 27, 2024. Futabasha collected its chapters in fifteen volumes, released from January 12, 2018, to October 10, 2024. The manga is licensed in North America by Seven Seas Entertainment.
An anime television series adaptation was announced in the November 2019 issue of Monthly Action on September 25, 2019. The series was animated by Wolfsbane and directed by Tatsumi, with Nora MÃ Âri writing the scripts and Rui Ishige designing the characters. It aired from July 11 to September 26, 2020, on Tokyo MX, AT-X, and GYT. The opening theme song, , was performed by Yui Ninomiya as her character Luvelia Sanctos. The ending theme song, , was performed by Hilcrhyme. Shusei's Project performed an insert song titled "Ti amo". Sentai Filmworks has licensed the series and streamed it on Hidive. Crunchyroll also streamed the series.
On August 13, 2020, Hidive announced that the series would receive an English dub.
On November 11, 2021, it was announced that a second season had been greenlit. The second season, titled , features returning staff and cast, with Seven involved as the secondary studio. It aired from October 10 to December 26, 2022, on Tokyo MX, AT-X, and BS Fuji. The opening theme song, , was performed by Isekaijoucho. The ending theme song, , was performed by Hilcrhyme.
A mobile RPG of the series titled was released on October 11, 2022.
A browser game, titled Peter Grill and the Philosopher's Time: Defender of Virtue, was released on the HTML5 game platform G123 published by CTW in October 2022.