Kousha no Ura ni wa Tenshi ga Umerareteiru Manhua

As Rika delved deeper into the mystery of the hidden truths behind the walls of her school, she uncovered shocking secrets that challenged everything she thought she knew. The once bright and cheerful facade of her new friends, Sora, Hikari, and Aya, began to crumble, revealing darker intentions lurking beneath the surface. Caught in a web of lies and deception, Rika's heart ached as the lines between friend and foe blurred. She struggled to make sense of the betrayal surrounding her, grappling with feelings of hurt and confusion. But amidst the chaos, one truth remained unwavering - her own inner strength and unwavering belief in the power of true friendship. As the final confrontation loomed, Rika found herself standing alone at the crossroads of loyalty and truth. With courage kindling in her heart, she resolved to unearth the ultimate secret behind the walls and confront the angels that lay buried within the shadows. In a heart-stopping climax of revelations and redemption, Rika's journey of self-discovery culminated in a powerful realization - that the bonds of friendship forged in the fires of adversity were the true treasures that shone brightest in the darkness.