In this one Tenchi gets a suprise party in honor of him.But who planned it?Not any of the girls...

At the Masaki residence,everything was peaceful.Washu was taking a stroll(not in her lab,for once).Ayeka was watching soap operas.Sasami was cooking,and Mihoshi was fighting over the 2nd TV with Kiyone.Ryoko was looking for Ryo-ohki.Just a normal day...
Tenchi was at Katsuhitos shrine doing chores.Nobuyuki was at work.Then Tenchi went into the house.
"Surprise!!"the girls yelled.Sasami said "Come look at the food!" There were cakes,rice and other stuff.A mountain of food!"You didn't have to do this,guys uh,i mean,girls.Who planned this?"Everybody looked puzzeled."We don't know.Somebody told us to do this,"Ryoko said,"just yesterday.""Then who planned it?""Like I said,we don't know.
**Hint:it's the 7th girl and it's NOT Sakuya.**
After the party,Tenchi looked for the party thrower.A figure snuck up behind him,covered his mouth,and said"I threw the party.My name is Mitsuro."
"MMMPHHHH!"Tenchi said."Lph ee oo!Eeepppppp!Reoho!!!"
***
Will Tenchi get back to the house "unharmed?
Who is Mitsuro?
Find out in No Need For A 7th!