Oppa,

have this coffee,

it’ll make you feel better.

Oppa,

have this teddy bear,

it’ll make you feel better.

Oppa,

I’ll put this in your bag.

You’ll feel better.

Oppa,

I’ll take your picture,

so you’ll feel better.

Oppa,

I’ll follow you,

so you’ll feel better.

Oppa,

I’ll see you tonight,

so you’ll feel better.

Oppa,

I won’t let you go,

so you’ll feel better.

Oppa,

all these things that I’ve done,

I do them to make you feel better.

So why do you frown at us?

Why do they call us names?

Why do they ban us from seeing you?

I just want to make you feel better.

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The coffee is the coffee that a 'fan' gave to Himchan which was drugged with constipation meds.

The teddy bear was given to Kai. It had a hidden camera in it.

Someone put underwear in an EXO's and DBSK's member's bag. 

Some of them might be false rumours, fortunately.

Take a minute and understand each line, please.