As Haruki gets to know the girls better, he faces various challenges designed to test his compatibility with each of them. These challenges range from solving puzzles to overcoming obstacles. He must also deal with jealousy, as some girls compete for his attention while others form unexpected friendships.
Haruki learns that the Heart's Challenge is not just about finding a soulmate; it's also about navigating complex social dynamics and making difficult choices.Throughout the challenge, Haruki experiences moments of heartbreak as he realizes that not every relationship can last. Some girls decide to end their pursuit of him, while others are eliminated due to the challenge's rules.
These experiences teach Haruki the value of communication, empathy, and the importance of respecting others' feelings. He begins to understand that love is not always about finding the perfect match, but about cherishing the moments shared with those around him.