Although she can't see him, if she makes a sound, everyone around her will find out. In this temporary closed space, Mana-chan feels more excited than usual during the super close voice-holding sex that takes place under the covers, and she reaches silent climax in various situations! Even if she desperately tries to suppress her voice, the obscene sounds of intercourse made by the intertwining bodily fluids leak out... Her sexual desire goes out of control in this situation!