地っ球の平和をま～もるためっ！！

Main character's father who works as a researcher of the Earth Defense Force, writes a letter declaring his intent to remarry. Protagonist suddenly has to take care of two young girls. The next letter father sends is an appeal to prepare for aliens invasion. What the hell is going on here? [From [url=https://vndbreview.blogspot.com/2019/05/vn-of-month-february-2003-routes.html]vndbreview[/url]]