The highly anticipated episode 9 of The 100 Girlfriends Who Really Love You Season 2 premiered on March 9, 2025, carrying forward the story of Rentarou, who, after proving his lack of beauty, tragically went bald. Fortunately for him, his friend Kusuri possessed a Hair-Growing drug, paving the way for Rentarou’s return to his former stylish self. This plot twist inspired the entire cast to experiment with new hairstyles.
As Hahari decided to try the Hair-Control drug, she inadvertently unleashed an uncontrollable hair growth phenomenon that enveloped the entire planet, affecting most of Rentarou’s girlfriends. Rather than succumb to despair, Rentarou bravely approached Hahari and, after rousing her from her turmoil, she cleverly directed her hair towards the Sun, thereby averting a global catastrophe.
Disclaimer: This article contains potential spoilers from The 100 Girlfriends Who Really Love You Season 2 Episode 9.
Episode Recap: Hahari’s Hair Takes Over the Planet

The episode titled “The World Hair Only Grows“opened with Rentarou learning about an impending ice age sparked by global warming. His spirits were dampened further when he discovered his baldness, a consequence of a hair competition against Nano and Mimimi. In a bid to restore his hair, Kusuri introduced the Hair-Growing drug, which soon led to a creative explosion in hairstyles among the group, thanks to Hahari’s suggestion.

As Hahari took the Hair-Control drug to achieve her desired long hair, things took a chaotic turn. Her hair began to expand uncontrollably, leading it to engulf members of the Rentarou family. Pursuing a heartfelt aspiration to nurture everyone around her, Hahari found herself in a predicament, with her hair quickly transforming into a threat.
As panic ensued, Hahari’s hair wreaked havoc, taking down members of the Rentarou family as they attempted to flee. With only a handful of girlfriends remaining, they navigated a skyscraper, only to realize that the entire world was enveloped in Hahari’s hair strands.

Determined not to abandon Hahari, Rentarou rushed back to the school, the epicenter of the chaos. With the help of Meido and Shizuka arriving in a helicopter, Rentarou grappled with the urgency of rescuing Hahari while leaving behind Nano and Mimimi.
Upon reaching the school, Rentarou plunged into a treacherous hole where Hahari was trapped in her tangled hair. Despite facing physical challenges from the dense strands, Rentarou persevered, receiving a supernatural push from Hahari’s late husband’s spirit. His effort culminated in a passionate kiss that revived Hahari and eased her fears, prompting her to apologize for the turmoil she had unintentionally caused.

In a moment of clarity, Rentarou encouraged Hahari to harness the power of the Hair-Control drug to redirect her unstoppable hair towards the Sun. This creative solution successfully liberated the Earth from the overwhelming hair, showcasing the strength of their bond in the face of adversity.
The following morning, while Hahari reflected on her near-catastrophe, Rentarou reassured her by sharing the news that her hair had caused no harm. Remarkably, the hair sent to the Sun transformed into fuel, generating heat to fend off the looming ice age. The episode concluded with Rentarou’s girlfriends entering Hahari’s room, lifting her spirits as she breathed a sigh of relief.