トリニティセブン 7人の魔書使い [Trinity Seven - 7-nin no Masho Tsukai]

In this compact 2011–2013 series from Fujimi Shobo, a young man’s ordinary life shatters when a magical phenomenon known as a “崩壊現象” (Collapse Phenomenon) plunges his world into chaos, leading him to a mysterious academy where he must navigate the powers of seven formidable female mages—the Trinity Seven. Written and illustrated by the creative duo サイトウケンジ (Kenji Saito) and 奈央晃徳 (Akinari Nao), this seven-issue comic quickly established a core premise of magical battles, harem dynamics, and a protagonist learning to control his own hidden abilities. Though brief, the series matters as a fast-paced, self-contained entry in the magical school genre, offering a concentrated dose of its signature blend of action and character-driven intrigue.