Yukari, the gap-dwelling yokai, finds herself at odds with the meteoric rise of Spell Bubble across Gensokyo, viewing the phenomenon as a threat to be contained. Rather than simply forbidding its spread, she devises an unconventional scheme to regulate the game's influence. Through this arc, players witness how both Gensokyo's inhabitants and Yukari herself gradually come to terms with the new pastime, overcoming their initial skepticism and resistance to embrace what once seemed like an unwelcome intrusion.