The fourth episode of the second season of Tonikaku Kawaii, titled "Spots to Kiss," is a heartwarming exploration of Nasa and Tsukasa's evolving relationship.

In this episode, Nasa's selflessness is on full display as he goes out of his way to create study aids for Aya, who has neglected her studies and is now panicking about her exams. His unwavering support and humble approach to his intelligence make him a relatable character that fans can root for. However, Nasa's dedication to helping others carries the risk of burnout, and it's fortunate that he has Tsukasa to look after him. Tsukasa, in turn, serves as Nasa's support system, ensuring he doesn't overexert himself while caring for others.

Kaname, the curious teenager, plays a key role in spicing up Nasa and Tsukasa's relationship by sharing her "kiss research" with them. Her meddling leads to some of the episode's most entertaining and memorable moments.