No urgent mission for next week, but we get story mission(s), increased drops, silver XP bonus and a total domination. So daily farming it seems.
Worth noting that it says the increased drops will be available until the maintenance of April 28th (Friday), which does mean a short event next week. Sucks.
Notice: Maintenance

Thank you for playing Millennium War Aigis.

Maintenance will be performed on April 18, 2017 (Tue) 3AM.
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Maintenance Period
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April 18, 2017 (Tue) 3AM ~
April 18, 2017 (Tue) 6AM (EST) (Estimated Completion Time)

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Maintenance Details
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Limited Time Event
- The Urgent Mission
　"The Challenge of the Holy Hammer Warrior" ends
- The Item Drop Rate for Story Missions is x1.5 begins
- The Item Drop Rate for Daily Missions is x1.5 begins
- The Item Drop Rate for Awakening Orb is x2 begins
　The Item Drop Rate will be available
　until begin of maintenance on April 28(Fri).
- The Total Domination Mission "Sleeping Desert Treasure" begins
　Event period: April 18, 2017 (Tue) 6AM ~
　May 16, 2017 (Tue) 3AM (EST)

Other Changes
- Added the Story Mission "Eastern Wind" Extra
- Changed the Unit boosted in Premium Summon
- Basic EXP x3 for Silver female units
- Basic EXP x1.5 for Silver male units
　(Only basic EXP will increase; levels will not increase.
　EXP will return to normal after the maintenance scheduled
　for April 28, 2017 (Fri) 3AM. )

All users should be sure to finish their current games 5 minutes
prior to the start of maintenance.
Game data may not save properly in the minutes before
maintenance commences.

Please be aware that you will not be able to play the game during
the Maintenance Period listed above.

We apologize for any inconvenience this may cause, and ask for
your understanding and cooperation.

The Millennium War Aigis Development Team