Kinsei Tokkyuu

Sakura grew up on Inuhebi Island, a remote island inhabited only by women. One day, when she turned 15, two mysterious men landed on the island. When one of the men spotted Sakura, he said with a big smile, "We've come to pick you up, Sakura." Introducing themselves as Mitsuki and Sunaetsu, they were associates of Sakura's father and seemed to know about her past, something that even Sakura herself didn't know. Sakura decided to leave the island with them to see a world she had never seen before, but... (Source: Shinshokan, translated)

Natsukasa, the 52nd of the White Chain, infiltrates a French Foreign Legion fortress to investigate, and meets a company commander named Louis, who has a void in his eyes...? Satetsu and Eustace travel the world to retrieve the mysterious power left behind by Venus. The princesses continue to research languages while fighting against the Pure Lands, and the Yuezhi who protect them. And Sabimaru, who is raising a daughter with Venus. This is a collection of exquisite spin-off stories from the hugely popular series, depicting some untold stories from the century-old love story between Sabimaru and Venus, as well as the aftermath of their journey. (Source: Shinshokan, translated)