Wondering if someone can help. Trying to find a loli manga I read a long time ago. Plot goes something like this, sorry for the length.

Two girls visit a boy to celebrate his birthday. Since they like the same boy, they hate each other's guts. One (or both) of the girls brings a cake. Each girl tries to get the boy's attention, one gets in the others' way and gets cake dumped all over the other girl.

Since her clothes are messy now, the girl takes her top off and it turns into a competiton on which girl is sexier. One of the girls takes action and demands the boy have sex with the girl he likes best. The boy can't make a decision and does both simultaneously (gets rubbed by their pussies).

Next day, the girls call a truce since the boy likes them both. Later they both get pissed at him when they realize he has the hots for the homeroom teacher.

The description pretty much gives every detail of the manga so I didn't leave much out. Hope you guys can help.

Pic semi-related. 'Cause it's a threeway.