Go For It, Nakamura-kun!! Episode 5: Vexing! Are They an Item?!

Nakamura pores over a secret notebook, meticulously outlining a 'Friendship Plan' for Hirose. He dreams of walking home together, eating lunch, and using first names, cherishing a memory of a shared walk. Most of his goals remain unchecked, a daunting list of intimacy he struggles to achieve. He observes Hirose's easy popularity, holding onto hope from a past compliment, steeling himself for the next step.

The quiet ambition of Nakamura's plan shatters as Takeuchi-kun bursts in, immediately draping an arm around Hirose. This newcomer, with his casual physical intimacy, effortlessly crosses boundaries Nakamura can only imagine. Nakamura's internal monologue spirals into panic and then boiling jealousy as he watches Takeuchi lean, laugh, and even share food with Hirose, his own lunch forgotten.

Driven by a consuming need to observe, Nakamura follows the pair, hiding in bushes. He sees Takeuchi's hand move towards Hirose's, a fleeting touch that ignites a demonic aura around him. His imagination runs wild, envisioning Takeuchi fulfilling every romantic milestone from his notebook: sharing earphones, an umbrella, even feeding Hirose. Nakamura shakes with rage and vows to separate them.

Back in class, Nakamura channels his fury into aggressive chalkboard cleaning, watching as Takeuchi effortlessly hoists a blushing Hirose to reach a high spot. The giggles of other students only fuel Nakamura's rage. He retaliates with a violent cloud of chalk dust and later 'accidentally' splashes Takeuchi with his drink. His brief triumph dissolves as he sees Hirose gently helping Takeuchi dry off, realizing his actions only push them closer.

Nakamura observes them sharing earphones again, but a shift occurs; he acknowledges Hirose's general kindness. The question 'Are you two dating?' from a classmate sends Nakamura's heart into a terrified pause. Takeuchi then reveals his elaborate 'BL strategy' to attract Hamaoka-san, who loves the genre. Hirose confesses he was only going along with it, visibly tired of the charade. Hamaoka-san accepts Takeuchi's confession, but on the bizarre condition that he continues his 'intimate' displays with Hirose for her enjoyment, leaving Nakamura deeply unsettled.

The school enters 'Disciplinary Inspection Week,' and Nakamura, a model student, feels secure despite the strict reputation of the teachers. However, Hirose arrives late and is immediately confronted by Yamagiwa-sensei, the fearsome disciplinary teacher, who accuses him of dyeing his hair. Hirose insists his hair is natural, but Yamagiwa-sensei aggressively prepares to shave his head. Just in time, Nakamura's homeroom teacher, Otogiri-sensei, intervenes, placing a firm hand on the clippers. He coolly asserts he will handle Hirose's 'instruction' himself, leading him away as his booming, angry voice echoes through the halls, leaving Nakamura and the others fearing the worst.

The classroom door opens, and Hirose emerges, unharmed. It is revealed that Otogiri-sensei had only faked his anger, shouting at walls while Hirose hid safely. Nakamura is awestruck by Sensei’s cleverness and 'cool' demeanor, noticing Hirose's admiration too. Inspired by this display of 'manliness,' Nakamura decides he must become strong and dependable like Sensei to win Hirose’s heart. He embarks on a misguided quest, purchasing and chugging an excessive amount of 'Gigant Protein' powder, much to his sister's skeptical amusement.

The next day, Nakamura suffers immensely in math class, clutching his abdomen, his face a sickly shade of purple. Otogiri-sensei notices his distress, and Hirose immediately offers to escort him to the nurse's office, his face full of genuine concern. Nakamura is mortified by his condition but deeply moved by Hirose's unexpected kindness and willingness to help.

Resting in the nurse's office, Nakamura overhears voices and sees shadows through the curtain that he immediately misinterprets as Otogiri-sensei and Hirose engaging in an intimate moment. His heart shatters at the thought of his hero and his love interest bonding behind his back. The curtain is pulled back, revealing the mundane truth: Sensei was merely showing Hirose a move in a mobile game. Relief washes over Nakamura, as Sensei mentions the upcoming Yokohama school trip, instantly lifting Nakamura's spirits.

Reinvigorated, Nakamura stands on his infirmary bed, loudly vowing that the Yokohama field trip will be his ultimate chance to make a real connection with Hirose. He resolves that nothing, not protein-induced stomach aches or rivals, will stand in his way. As the credits roll, showing glimpses of school life, Nakamura's voiceover reflects on lessons learned about jealousy and inspiration, settling on renewed hope. He tentatively adds 'Yokohama Trip' to his 'Top Secret' notebook, symbolizing a fresh start.