Hi all! I was able to find something that was able to give some form of "gameplay" explanation. Here's the link if you want to read the original source: http://hiroshima-ch.com/pachinko/machine/book_462.html

I've also used the google translate to put it in english here:
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CR fever the king FX
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[TD="width: 25%, bgcolor: FFA000"]SANKYO
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[TD="bgcolor: FFA000"]basic specifications
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[TD="width: 25%, bgcolor: FFC050"]Jackpot probability
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[TD="width: 60%"]1/354.5 → 1/59.1
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[TD="width: 25%, bgcolor: FFC050"]average ball
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[TD="width: 60%"]Approximately 2100 pieces
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[TD="width: 25%, bgcolor: FFC050"]Definite change (time saving) rush
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[TD="width: 60%"]A jackpot of 2 lines or more is guaranteed. The variable entry rate is 1/2. There is a time saving of 100 rotations after all jackpots.
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[TD="width: 25%, bgcolor: FFC050"]limiter
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[TD="width: 60%"]none
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[TD="width: 25%, bgcolor: FFC050"]Interesting (self-judgment)
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[TD="width: 60%"]65%
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[TD="bgcolor: FFA000"]Installation store
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[TD="width: 28%"]　[/TD]
[TD="width: 28%"]　[/TD]
[TD="width: 28%"]　[/TD]
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[TD="width: 28%"]　[/TD]
[TD="width: 28%"][/TD]
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[TD="bgcolor: FFC0A0"]Pay attention to the size of the drum screen and the double structure of the drum.
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[TD="bgcolor: #FFFFCC"]Preview commentary[/TD]
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[TD="width: 25%, bgcolor: FF3030"]Notice name
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[TD="width: 55%, bgcolor: FF3030"]action[/TD]
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[TD="width: 25%, bgcolor: FFD0A0"]Nana-chan preview[/TD]
[TD="width: 55%"]Nana-chan appears in the left corner. Reach notice.[/TD]
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[TD="width: 25%, bgcolor: FFD0A0"]Nana-chan & Yumu-chan preview[/TD]
[TD="width: 55%"]Nana-chan appears in the left corner, and Yumu-chan appears in the right corner. Reach confirmed. If the bell rings at this time, your credibility will increase.[/TD]
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[TD="width: 25%, bgcolor: FFD0A0"]Drum-kun preview[/TD]
[TD="width: 55%"]A development from Nana-chan and Yumu-chan's preview. After the reach is confirmed, Drum-kun will appear filling the screen. SP reach confirmed.[/TD]
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[TD="width: 25%, bgcolor: FFD0A0"]blue flash notice[/TD]
[TD="width: 55%"]7 appears on the changing reels. The background turns blue. SP reach confirmed.[/TD]
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[TD="width: 25%, bgcolor: FFD0A0"]red flash warning[/TD]
[TD="width: 55%"]I agree with the blue flash notice. The difference is that the background changes to red. Extreme heat warning.[/TD]
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[TD="width: 25%, bgcolor: FFD0A0"]V-shaped flash notice[/TD]
[TD="width: 55%"]After the blue flash, the reels will have a V-shaped flash. Guaranteed jackpot.[/TD]
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[TD="width: 25%, bgcolor: FFD0A0"]Drum-kun chance[/TD]
[TD="width: 55%"]If Drum-kun appears during the fluctuation, you have a chance. It's so hot that it continues.[/TD]
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[TD="width: 25%, bgcolor: FFD0A0"]3 consecutive 7 notices[/TD]
[TD="width: 55%"]It stops with three consecutive 7s on the left reel. premium.[/TD]
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[TD="width: 25%, bgcolor: FFD0A0"]Dokkan preview[/TD]
[TD="width: 55%"]All of a sudden there are 7. premium.[/TD]
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[TD="bgcolor: #FFFFCC"]Reach commentary[/TD]
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[TD="width: 30%, bgcolor: FF3030"]Reach name[/TD]
[TD="width: 60%, bgcolor: FF3030"]action[/TD]
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[TD="width: 30%, bgcolor: FFD0A0"]Normal reach
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[TD="width: 60%"]The middle eye changes. Returned, there was some slippage.
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[TD="width: 30%, bgcolor: FFD0A0"]magical step reach
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[TD="width: 60%"]A development of normal reach. The left and right reels move down, and the middle reel moves up. Variable up to 3 laps. Confidence increases after 3 laps. There is a 2-step pattern.
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[TD="width: 30%, bgcolor: FFD0A0"]Major earthquake reach
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[TD="width: 60%"]A development of normal reach. If 7 moves again after the heartbeat is heard, it is a severe fever. 7 on the left and right reels moves frame by frame.
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[TD="width: 30%, bgcolor: FFD0A0"]full rotation reach[/TD]
[TD="width: 60%"]After Drum-kun appears, all reels spin at the same time.[/TD]
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[TD="width: 30%, bgcolor: FFD0A0"]long reach[/TD]
[TD="width: 60%"]The middle reel flashes red.[/TD]
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[TD="width: 30%, bgcolor: FFD0A0"]kick reach[/TD]
[TD="width: 60%"]A development of long reach. The number 7 on the reel moves in small increments.[/TD]
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[TD="width: 30%, bgcolor: FFD0A0"]lucky chance reach[/TD]
[TD="width: 60%"]A development of long reach. The 7 on the skeleton reel aims for up to 3 jackpots. If you advance to the third time (middle reel), the reliability will increase. There is a 2-step pattern.[/TD]
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[TD="width: 30%, bgcolor: FFD0A0"]Doremi Step Reach[/TD]
[TD="width: 60%"]Development from a losing result. Doremi. ．．．．The jackpot approaches with the rhythm of[/TD]
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