TV-Series
Description
Kōsuke Inukai is a fourth-year undergraduate student at Saitama University and a supporting researcher in the Ikeda Laboratory. He shares a childhood friendship with fellow researcher Ena Ibarada, rooted in common interests like video gaming. Inukai projects a confident ladies' man persona, frequently recounting elaborate romantic exploits. These stories are later exposed as fabrications lifted directly from dating simulation games. His genuine passion lies in a deep devotion to fictional female characters, particularly "Aika" from a dating sim. He claims a two-year relationship with Aika involving actions such as sleep-hugging and significant financial investment in related merchandise, including body pillows.

Physically, Inukai has blonde hair typically tied in a low ponytail, gold-colored eyes, and distinctive piercings. He often wears a soccer-themed T-shirt bearing the number 13 beneath his lab coat, reflecting a continued affinity for the sport despite no longer playing. This appearance contributes to an initial perception of conventional attractiveness.

His personality is characterized by a sharp contradiction between outward projection and internal reality. While presenting himself as socially adept with romantic experience, he privately identifies as an otaku with primary emotional attachments to two-dimensional characters. This duality stems from fear of societal judgment. When his devotion to "Aika" is uncovered, he faces initial ridicule. Temporary acceptance from labmate Shinya Yukimura offers brief validation. His interests extend to scientific discussions, exemplified by delivering a presentation on video game theory at a university conference in Okinawa.

Interpersonally, Inukai shares a close, teasing dynamic with Ena Ibarada, who uses the nickname "Torasuke" based on kanji wordplay involving his name. Within the lab, he primarily serves as comic relief, his otaku tendencies and exaggerated stories providing humor. Despite this role, he demonstrates loyalty, supporting the central romantic research between Yukimura and Ayame Himuro. His character development includes gradual acceptance of his identity, particularly after Yukimura's initial (though inconsistent) reassurance framing his preferences as a valid "sexual orientation." He actively contributes to campus festival preparations alongside other lab members.

The etymology of his surname Inukai combines "dog" (犬) and "rearing" (飼), while his given name Kōsuke incorporates "tiger" (虎) and "help" (輔). Ena Ibarada's nickname "Torasuke" directly references the tiger kanji. Beyond his personal narrative, Inukai occasionally facilitates broader plot points: inadvertently provoking conflict between Yukimura and Himuro through comparative statements on love quantification, and participating in group activities like cosplay events where his reactions to cross-dressing incidents add comedic elements.