FairySword

The protagonist is summoned to another world alongside his childhood friend, having lost most of his memories. A fantasy adventure unfolds as he strives to protect both his childhood friend and himself.

It seems this site is unable to provide a paid version. For the full version, please refer to: https://www.dlsite.com/maniax/work/=/product_id/RJ01590824.html

Explore a variety of maps, uncover the story, and discover new items and partners.

Turn-based combat: Use your allies' attributes and skills to defeat enemies.

Once the heroine returns to her adult form, sexual scenes will become available.

Use the items you discover during your exploration to unlock new sex scenes.   

The game features a date system. If enemies remain inside the base when a new day begins, the heroine’s energy will decrease. If her energy drops to 0, the game ends.