Ep. 10: Saku and friends investigate Mihoshi's weekend plans while Saku helps Fumie with a school event.
Aired on September 8, 2009

10
Saku, Hime, and Edogawa tail Mihoshi and Sōma after overhearing their weekend arrangements, suspecting a date. Their surveillance leads them to a cemetery where Mihoshi honors her father, who died in a car accident, leaving the trio feeling awkward. Meanwhile, Fumie attempts to gift Saku a bookmark from her Hokkaido school trip, but her glasses break when Saku shields her from a stray baseball. Saku offers to walk her home, but they encounter two literature club members who escort Fumie the rest of the way. Later, Saku enlists Fumie's assistance to organize a shooting star viewing event at school. Mihoshi is deeply moved by this gesture, showing her emotional response to the effort made for her.
Episodes
- Ep. 6 · Saku encounters new teacher Nozomu Sōma amid rumors about his connection to Mihoshi
- Ep. 7 · Saku Helps Literature Club While Rumors Spread About Him, Mihoshi, and Soma
- Ep. 8 · Cultural festival planetarium success followed by invitation to prefectural conference
- Ep. 9 · Autumn Stargazing Conference at Nogishiro High School
- Ep. 10 · Saku and friends investigate Mihoshi's weekend plans while Saku helps Fumie with a school event.
- Ep. 11 · Saku's astronomy club attends a winter stargazing camp with a girl from Takami Girls' School.
- Ep. 12 · Astronomy Club Members Stargaze and Face Future Recruitment Challenges