In the second episode of "My Tiny Senpai" titled "Despite Appearances, I'm More the Big Sister Type," the protagonist Akina discovers his colleagues Shinozaki and Shiori in an unusual situation triggered by a dropped pen. Assuming a romantic relationship, Akina assigns the two to find a new restaurant for business dinners, with the hidden agenda of sparking their romance.

After work, Akina secretly follows them and unexpectedly runs into Hayakawa, a childhood friend of Shinozaki. While she initially denies any romantic interest in Shinozaki, Akina and Hayakawa form a temporary team to observe the potential couple.

The plot thickens as Akina arranges a couples' table for Shinozaki and Shiori at a restaurant. This surprises Hayakawa, to whom Akina confesses his fondness for watching budding relationships. Throughout the episode, several intimate and awkward moments unfold, including Shiori leaning closer to Shinozaki to get a better look, which flusters him.

As the day ends, Shinozaki comically expresses his desire to spend more time with Shiori, making her blush. He then offers to walk her to the station. Here, Shinozaki's lucky umbrella becomes significant when Shiori gets caught in a rain shower. He offers to share his umbrella with her, leading to a quiet yet comforting journey home for Shiori.

The next day, Shiori worries about the sick Shinozaki and visits him after work to cook a meal. Touched by her kindness, Shinozaki decides to repay her with a gift suggested by Hayakawa—a cute apron. Shiori happily accepts the gift, seeing it as an invitation to visit him again.

To conclude the episode, Akina humorously suggests that Shinozaki and Shiori take a day off together. The two respond cheerfully, asking him to take it slow.