When a local street food vendor gives everyone except Sekine an extra takoyaki ball, the other girls feel guilty. This leads to a series of comedic misunderstandings as they try "too hard" to be nice to Sekine, which only makes her feel more excluded.
The group attempts to throw a surprise party for Chiyo. Rikka considers brainwashing Chiyo to ensure the surprise works, but Tsubasa (Tsuyoshi) genuinely remembers her birthday and prepares a gift. 4-nin wa Sorezore Uso wo Tsuku Episode 3
To avoid looking like she forgot Chiyo's birthday, Sekine is forced to use a "forbidden" psychic skill that causes her to temporarily gain weight so she can sky-write a birthday message. Character Developments When a local street food vendor gives everyone
Her dedication to her friends is shown to be intense, though her alien logic often results in potentially world-threatening solutions to minor social problems. Rikka considers brainwashing Chiyo to ensure the surprise
The episode emphasizes her role as the "straight man" of the group, burdened by knowing everyone else's secrets while struggling with her own social standing. 4-nin wa Sorezore Uso wo Tsuku - Episode 3 discussion