Squashed commit of the following:

commit 2a47a225adc7b29302fc360e1e7cfce367767806
Author: Bufferin <merrymake@ybb.ne.jp>
Date:   Thu May 22 16:36:13 2014 +0900

    来年

commit bab5f13bc5723f1ccd7262681481ddc5fd0c9fcd
Author: Bufferin <merrymake@ybb.ne.jp>
Date:   Thu May 22 16:35:33 2014 +0900

    来月

commit a6ce6a443d336e238bdd5ed3094d1faa22f17093
Author: Bufferin <merrymake@ybb.ne.jp>
Date:   Thu May 22 16:34:55 2014 +0900

    来週

commit bb306278e3386e5b8e63c658d3b6fac56516ca75
Author: Bufferin <merrymake@ybb.ne.jp>
Date:   Thu May 22 16:33:10 2014 +0900

    明日