ハル姉が僕に××する理由•Haru-nee ga Boku ni xx Suru Riyuu

The Reason Haru-nee Did xx to Me

When Hideto, a high-school student who is afraid of women, is suddenly targeted by a beautiful older woman whom he believes to be a molester, he runs for his life. Mid-pursuit, he is attacked by what he previously believed to be an illusion, a blur that nobody else could see. (Source: MU)