Heartbeat Potion Idol Swap

Rimuru

This will revolutionize idol performances! Imagine healing people with your singing voice!

Shiki

But what if my voice gets stuck sounding like a healing spell forever?

Kusuri

The potion's stable for exactly 100 heartbeats. After that, your voices revert automatically.

Rimuru

(Time to see which voice packs more magical punch.)

Shiki

Here goes nothing... for science and idols!

Kusuri

(The countdown's accelerating! At this rate, their voices will swap permanently after 10 beats!)

Rimuru

The stabilization formula needs... but I used the last of the dragon tears!

Shiki

(My voice... it's actually healing the lab equipment? But I sound like Kusuri's medicine chants!)

Kusuri

(Heartbeat counter at 127... 128... it's not stopping!)

Rimuru

Dragon tears, phoenix feathers, even slime core essence... nothing left to reverse it!

Shiki

La-la-la... why does my voice keep rising higher?

Kusuri

(The vapor's responding to her heartbeat pattern... it's creating a feedback loop!)

Rimuru

If I can absorb the excess magical energy... but it's too synchronized to her heart!

Shiki

(My heart... it's syncing with the laboratory itself! Every beat echoes through the walls!)

Kusuri

Zero heartbeat... but she's still singing. Wakana-chan, your voice... it's become the laboratory's pulse!

Rimuru

(The entire lab is alive now... and it's using her idol voice as its heartbeat. We didn't just swap voices... we gave the building a soul.)