As children, Shishimaru and Leo were inseparable. Shi-chan was so infatuated with Leo that he proposed to him! But as the years went by, they grew up and parted ways—until ten years later, when the two reunite. Have their feelings remained or have they been apart for too long? (Source: Seven Seas Entertainment)

Lion Hearts was published in English by Seven Seas Entertainment on July 22, 2025. It was also released in Polish by Dango on December 4, 2023.