No one besides Saku has joined the astronomy club, so recruiting tactics are still going on. Hime Makita from Saku's class is annoyed that Mihoshi and other astronomy members come to their class so often when she would rather spend some time alone with Saku. Hime met him on the bus to take the entrance exam of the school they now attend, and was thrilled to see they were put in the same class. After Hime finds out that Saku and Mihoshi are not dating, Hime joins the astronomy club, which finally becomes officially recognized. Another day, the astronomy club members go stargazing far from the city's lights.

Mihoshi has been bothering Saku too much lately so he takes a break from the club and goes to the library where he meets the student council president Fumie Kotozuka by chance. After talking with her, Saku realizes Mihoshi is merely expressing her feelings honestly like she always has and Saku agrees to accompany her with stargazing. However, the rainy season begins causing Mihoshi to get very depressed over the cloudy skies. With Saku's suggestion, the astronomy club goes to the planetarium and are shown the summer constellations. After the rain ends, Mihoshi wants the club to go on a summer stargazing camp.

Fumie finds the astronomy club members sleeping in the same room after they collapsed from exhaustion the previous night, and she forbids them from taking part in club activities for one night. The next day, three guys hit on Hime and two literature club members, and Fumie tries to interfere at first, but when Saku goes to help, he trips and falls into the guy's fist. Mihoshi and Hime manage to take care of the three guys, and Saku is taken inside and cared for, though he only has a small cut. While the other astronomy club members are taking a bath, Fumie talks with Saku about the astronomy club's activities and they decide to invite the literature club members the next night to show them what the astronomy club does at night. Hime takes care of pointing out several constellations and the Milky Way, and everyone enjoys the night of stargazing.

The cultural festival begins, though initially no one is coming to see the planetarium. After Haruko from the city planetarium arrives, she helps to bring in the people and the planetarium is well received by viewers for the rest of the day. Mihoshi thanks Saku for everything he has done for the club and is thankful that she has not caused him any trouble while he was helping the literature club. After the festival, the club members are distraught at the thought of dismantling the planetarium, but eventually take it down. The astronomy club was not able to win any prizes for the festival and thus still do not have enough money to even buy a telescope. Sayo takes the club to her family's Buddhist temple and perform a small moon festival. The astronomy club receives a video letter from the president of the astronomy club of Nogishiro High School in the same prefecture as Sōei High School inviting the club to the Autumn Stargazing Conference of the Prefectural High School Astronomy Network.