Fudou Aikawa and Desumi Magahara have just started dating, but no one is allowed to know! Nicknamed Red Gelato, Fudou is the leader of Gelato 5, a group of heroes dedicated to protecting Japan. On the other hand, the Reaper Princess Desumi is one of the combatant leaders of Gekko, an evil secret society bent on world domination and considered Gelato 5's greatest foe. As they pretend to be mortal enemies, Fudou and Desumi sneak away from battle to spend time together. Despite their inexperience with romance, Fudou and Desumi strive to make their relationship work while avoiding suspicion from their comrades. With their loyalties divided between each other and their respective sides, the couple will have to stay on guard if they want to keep their love a secret from the rest of the world.

After an exciting and momentous cultural festival, Shouko Komi continues her endeavor to make one hundred friends alongside her friend and classmate Hitohito Tadano. As winter begins, the class is joined by the seemingly delinquent student Makoto Katai, who has been absent since the first week of school. Despite his intimidating appearance, Katai has difficulty communicating with others and just wants to befriend his classmates. As new friendships form and current ones deepen, Komi and Tadano’s relationship begins to change—though not necessarily for the worse.

In a world where monster invasions are rampant and frequent, being an adventurer in a party is considered one of the most desirable jobs for the honor and fame it provides. Wanting to make a name for himself, a young human warrior named Alvin intends to start his career by completing a low-level request for the guild. While en route, Alvin is confronted by a magical bear and immediately finds himself in a pinch. As luck would have it, a dark elf healer named Karla approaches and asks if Alvin requires assistance—being seemingly oblivious to the situation before her eyes. After a discussion needlessly complicated by Karla's absurdly eccentric personality, Alvin somehow convinces her to help him. Unfortunately, instead of healing him, she accidentally casts a curse: if Alvin strays too far from her, he shall die. Despite being forced to accompany Karla until the curse is broken, Alvin remains steadfast in his ambition to become a full-fledged adventurer. With a partner by his side, the journey toward his goal may grow easier—or harder—depending on Karla's whims.

Novice bounty hunter Chateau Dankworth never expected to encounter someone capable of overpowering her in combat. Even less so that the mysterious man would take an immediate interest in her—to the point of aiding her missions. However, Chateau makes it clear that she has no plans of entertaining any personal involvement with him. Chateau's company is soon tasked with eliminating Song Ryang-ha—an expert assassin and a former member of a powerful Asian organization. Coincidentally, Ryang-ha is the man that has been pursuing her. Despite his background, Chateau reluctantly agrees to meet with Ryang-ha as part of a deal: in exchange for going out with him, he will provide her with the locations of current targets, dead or alive. But when the past begins to haunt both killers, their arrangement may need to come to an end, as their entanglement puts their lives at grave risk.