Add "Yamiyo wa otome o hana ni suru" or in english "The Dark Night Turns Maidens into Flowers" track from senran kagura

Stealth - https://youtu.be/s7vJymG6tfE
Loud - original song https://youtu.be/tUrD_8imdvo

If music loud, you always can change volume in track.txt
Required CUSTOM OST mod