Best H-Game so far.
I do have some suggestion.
-combat part :
1) adding more weppon. adding more weppon for player to choose from such as an rifle or maybe a close combat weppon
2) Auto switch Runa's mode. such as If player's barrier disappears Runa will auto switch to defense mode and rush to protect the player until player's barrier start to regen
3)Enemy radar. i sometime didnt notice enemy. I suggest a warning arrow thats point towards the direction of the enemy
4)Harder Maps. I mostly encounter C rank or bellow.
-Daily part :
1)Runa's Interaction. Give her some reaction when player touch her body. like giving her headpads make Runa feels good
although all my suggestion. your game is hands down the best H-game i ever played. Looking forward on how you will craft this masterpiece.