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Games like Zettai Kaikyuu Gakuen Shiawase-iro no Tobira
If you finished Zettai Kaikyuu Gakuen Shiawase-iro no Tobira, the closest matches are Mixtape, Schrödinger's Call, Sovereign Tower, The Hundred Line: Last Defense Academy and Nighthawks. All 36 share its visual novel genre and are ranked by how closely their themes and modes overlap.
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Mixtape
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Schrödinger's Call
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Sovereign Tower
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TR-49
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No Sleep for Kaname Date: From AI - The Somnium Files
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Venba
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Ever 17: The Out of Infinity
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AI: The Somnium Files - Nirvana Initiative
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Renai Bakudan
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Beacon Pines
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Mado Monogatari: Fia and the Wondrous Academy
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Megaton Musashi W: Wired
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