Okina Matara's 「背面の暗黒猿楽」 "The Back Face's Sarugaku of Darkness" survival spellcard from Hidden Star in Four Seasons.

seen from United States

seen from Malaysia
seen from United States
seen from Germany

seen from Australia

seen from Ukraine
seen from China
seen from United States
seen from Lithuania
seen from France
seen from China
seen from Bangladesh
seen from China
seen from Maldives

seen from Germany
seen from United States

seen from United States

seen from Australia
seen from Russia
seen from Malaysia
Okina Matara's 「背面の暗黒猿楽」 "The Back Face's Sarugaku of Darkness" survival spellcard from Hidden Star in Four Seasons.

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Violet Detector has the same flower effect falling behind the "Now Loading" message as Hidden Star in Four Seasons, although the font has been changed (yes the loading screen background is also very similar, but it isn't the subject of this post).
Spellcard name butterfly background from Double Dealing Character, Impossible Spell Card, Legacy of Lunatic Kingdom and Hidden Star in Four Seasons - 640x480 resolution
Spellcard name butterfly background from Double Dealing Character, Impossible Spell Card, Legacy of Lunatic Kingdom and Hidden Star in Four Seasons - 960x720 resolution
Spellcard name butterfly background from Double Dealing Character, Impossible Spell Card, Legacy of Lunatic Kingdom and Hidden Star in Four Seasons - 1280x960 resolution.
The 1280x960 resolution has a different butterfly background than the other two. This happens in other games as well, but I will showcase them in another post.
Congratulations screens from Hidden Star in Four Seasons.
Toyosatomimi no Miko and Okina Matara (the extra stage appearance from Hidden Star in Four Seasons) have a common texture in their spellcard backgrounds. The flower pattern is the same, but it's not so obvious due to the colour changes during the spellcard.

Anya is live and ready to show you everything. Watch her strip, dance, and perform exclusive shows just for you. Interact in real-time and make your fantasies come true.
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Junko and Okina Matara have a common element in one of the textures from their spellcard backgrounds. Although the textures are not identical, they both have the image of the sea in them.
Stage 6 Okina and extra stage Okina from Hidden Star in Four Seasons have different sprites, but they also have different spellcard backgrounds. The backgrounds have a common texture, but it moves at different speeds.
In 100th Black Market, Eternity Larva's spellcard background is dark, but not as dark as during Wrong Sunday from Violet Detector. However, it's still darker than in Hidden Star in Four Seasons/Tuesday from Violet Detector.