An OVA series consisting of 6 episodes with a 4-minute runtime that were uploaded to Flowering Heart's Youtube channel from August 9th to August 24th, 2019. Each episode focuses on what happened at the summer camp where Ari and her friends partook in. The OVA has strangely stopped uploading episodes after releasing the 6th one, which can be due to Woo-Jin Lee's resignation and ongoing/further Flowering Heart-related projects being canceled.

With the world of magic being slowly corrupted by Hopeless Energy, Prince Chess flees to the Human World to prevent the withering of the Heart Flower. Three fifth-graders of the Problem Solving Club, Ari, Suha, and Min, finds him as a strange-looking hamster form. They later team up to collect Hopeful Energy to save Flowering Kingdom. Unbeknownst to them, Prince Trump and Shuel, their enemies, are seeking Hopeless Energy.

The second season of the Flowering Heart series which first premiered on May 24th, 2017 and ran for 26 episodes. Continuing from where the previous season concluded, Shuel is now collecting Hopeful Energy alongside Ari, Suha, and Min and joins the Problem Solving Club. However, Trump, in order to help his mother, is actively collecting Hopeless Energy by using a pendulum that forcibly controls people with dark magic. Now, Ari and her friends must use light magic to reverse this recurring curse.

The third season of the Flowering Heart series was planned since the series was originally a trilogy, according to an interview with a fan in September of 2016.[1] On November 29, 2017, the executive producer, Woo-Jin Lee, commented on Twitter that production on Season 3 didn't start due to the decrease of funds from Season 2. Initially, production on Season 3 was scheduled to begin in 2019 and release in 2020.[2] However, Woo-Jin Lee resigned in the first half of 2019, which resulted in disruption for future development. In 2021, Iconix themselves said that the production was eventually canceled.