Tensei shitara Slime Datta Ken OVA  

TenSura OVA, That Time I Got Reincarnated as a Slime OVA, 転生したらスライムだった件 OVA, Tensei shitara Slime Datta Ken Gaiden, That Time I Got Reincarnated as a Slime Extra, ten·sura, เกิดใหม่ทั้งทีก็เป็นสไลม์ไปซะแล้ว OAD

In Japan, on March 27th, 2020, volume 14 of the series will be released. This volume contains an original trilogy written by Fuse and includes three parts that are bundled with manga volumes 14, 15, and 16. The episode from the 13th volume focuses on the Sumo competition held at Tempest for the first time, which was suggested by Rimuru. At Ingracia Kingdoms Freedom Academy, where Rimuru teaches Shizues students, it's time for the annual outdoor training event. During this event, the students will test their combat skills in the field. Rimuru is determined to win the competition and take home the prize money, but he faces a challenge from Jeff, an honorary teacher who views him as a rival. Suddenly, during the competition, an unexpected enemy appears!