Base on BOOTSTRA.386 with tiny modify.
Not Bootstrap 4

Assume your MVC project theme didn't modify before, just replace/add following folder to project.

Content
fonts
Scripts

Then add bootstrap-386.js in App_Start\BundleConfig.cs.

bundles.Add(new ScriptBundle("~/bundles/bootstrap").Include(
            "~/Scripts/bootstrap.js",
            "~/Scripts/bootstrap-386.js"));

If need, add js setting in Views\Shared\_Layout.cshtml or other place you like to.

<script>
    _386 = { onePass: true, speedFactor: 1.5 };
</script>

That's all.