Fukushuu no Miboujin The Widow Takes Her Husband's Revenge.

Synopsis

Revenge never felt so good... Mitsu Suzuki is a talented contract engineer working for an IT company, but it wasn't their benefits package that attracted her. She's working for the company that drove her late husband to suicide, and she won't rest until she exacts her revenge on each and every person responsible. A sweet revenge story from up-and-coming author, Kurosawa R! (Source: Coolmic)