Nuki Doki- -tenshi To Akuma No Sakusei Battle- -

The series features a primary trio caught in the celestial tug-of-war, along with several secondary characters: Sera (Angel) : The representative of Heaven sent to contend for Yamato. Firika (Demon) : The representative of Hell and Sera's direct rival. Yamato Hitsuhara

The battle began immediately. At school, Sera attempted a "Stealth Mission." Using her invisibility cloak (which worked on everyone but Yamato), she tried to administer a "holy hand technique" beneath his desk during a math lecture. Nuki Doki- -Tenshi to Akuma no Sakusei Battle-