Payback Touchinv A Crowded Train Mizuki I -

The touch was light, but it was enough to set me off. I quickly pulled my arm away, trying to create some distance between us, but the stranger seemed oblivious to my discomfort. I shot him a dirty look, but he just stared back, expressionless.

Given the combination, the most logical interpretation is that you are seeking a based on a revenge story involving a character named Mizuki, who experiences inappropriate touching on a crowded train and enacts “payback.” payback touchinv a crowded train mizuki i

If you are looking for a specific series involving a "train rescue" or "childhood friend" dynamic (which are often confused with revenge tropes), you might be thinking of: The touch was light, but it was enough to set me off