As Kento Toi wakes up one morning at the age of 17, he is taken aback to find himself doll-sized. His doctor confirms that he is healthy, although there is one unusual issue - his heart has enlarged due to his love for an older schoolmate, and it threatens to escalate into a life-threatening matter. Unless Kento finds a boyfriend or eliminates his emotions, his life is in danger. Making things worse is his childhood friend, Yuki, who has his own plans for their relationship. This manga provides an absorbing and whimsical tale of love, along with additional stories like "Prince-Style Happy Endings," which revolves around a romance between the two most sought-after boys in school, and "How to Train a Misbehaving Boyfriend," a romance between two siblings.
