The Transfer Student is steadily gaining accomplishments and spends her busy days planning dreamfes that Jin has assigned to her. As she gains cooperation from the students of the idol course, the preparations for Tanabata are going smoothly, but Mitsuru can't seem to calm down...
Tanabata Festival (七夕祭, tanabata-sai) is an event story released on Jul 15th 2015. It could be obtained through point rewards during Challenge! Tanabata Festival Wishes event and is free to read on Basic in ! mode. The song Milky Starry Charm is associated with this story.
"This cycle (cycle?) I was in charge of the event (Tanabata Festival) and gacha (Pool Opening) for Ensemble Stars, and the event (Calamity) for Ensemble Girls. It's a mix of summer stories and nostalgic stories... or something like that (what)." [1]
Trivia
The composer for the song, Arte Refact, comments on this song here.
This cycle (cycle?) I was in charge of the event (Tanabata Festival) and gacha (Pool Opening) for Ensemble Stars, and the event (Calamity) for Ensemble Girls. It's a mix of summer stories and nostalgic stories... or something like that (what).