Big dick brother flirts with cheeky and masochistic sister (Motion Comic Version)

Summary: ❤️‍❤️‍❤️‍ [Survive] One summer day, the protagonist returns to her parents’ home at the request of his younger sister Lina. The reason is that her friend Nina wants to take her on a sea trip with her before she returns to her home country.
That’s what it was. While on a trip to the sea, at an inn, the two protagonists unexpectedly form a harem…!?
I was supposed to be enjoying the open atmosphere, but when the main character comes around, the atmosphere turns grim!?
I’m being swayed by an exchange student who seduces me every chance I get, and my girlfriend’s younger sister who wants to flirt with me every chance I get.

There’s no time to relax!?
A record of such a summer day…

ある夏の日、妹・リナに頼まれ実家へと帰省した主人公。
その理由は、友人のニーナが母国に帰る前に、一緒に海旅行へ連れて行って欲しい
というものだった。

旅先の海で、旅館で、主人公は二人と思わぬハーレム展開になる…!?
開放的な雰囲気を満喫する筈が、主人公を巡り、険悪な雰囲気に!?

隙あらば誘惑してくる留学生と、隙あらばイチャつきたい妹に振り回されて
気の休まる暇は…無い!?

そんな、ある夏の日の記録――