It is the first summer vacation with Chidori and the gang. Unexpected visitors appeared in front of the two while going to the beach and having a good time ──!? The first summer vacation we’ve had together ………

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みんなに内緒で交際中の千鳥となのはの初めての夏休み。海水浴に行ったりと楽しい日々を過ごす中、思いも寄らぬ来訪者が二人の前に現れて──!?初めて迎えた夏休み………未曾有の「あらし」が二人に迫る──安心してください、