jokaga omyeon gati manhwareul ilgeoyo.

It can mean either. 조카 is gender-neutral and can refer to niece or nephew.

If Korean needs to be more specific, people can add extra words from context, for example:

• 남자 조카 = nephew
• 여자 조카 = niece

Very often, though, context makes it clear.

가 is the subject marker. It shows that 조카 is the one who comes in the clause 조카가 오면.

So:

• 조카가 오면 = if/when my niece or nephew comes

If you used 조카는, it would sound more like setting 조카 up as a topic or contrast:

• 조카는 오면... = as for my niece/nephew, if they come...

That is possible in some contexts, but 가 is the most natural neutral choice here.

-면 means if or when, depending on context.

So:

• 오면 = if/when (someone) comes

In Korean, -면 is often used for both:

• a real condition: if they come
• a repeated situation: when they come

In this sentence, it can easily sound like a habitual situation, such as Whenever my niece/nephew comes, we read comics together.

The dictionary form is 오다 = to come.

To make -면:

1. remove 다
2. attach -면

So:

• 오다 → 오-
• 오 + 면 → 오면

That gives if/when (someone) comes.

Korean usually puts background information, conditions, and time expressions before the main action.

So the structure is:

• 조카가 오면 = if/when my niece/nephew comes
• 같이 만화를 읽어요 = we read comics together

This order is very natural in Korean. English can also do this:

• When my niece/nephew comes, we read comics together.

같이 here means together.

It is an adverb, so it describes how the action is done:

• 같이 읽어요 = read together

It does not literally mean the particle with here. The idea of with my niece/nephew is understood from context.

You could also say something more explicit, like:

• 조카와 같이 만화를 읽어요 = I read comics together with my niece/nephew

But in your sentence, just 같이 is enough.

만화 means comic / comics / manga depending on context.

The -를 part is the object marker. It marks 만화 as the thing being read.

So:

• 만화 = comic(s)
• 만화를 읽어요 = read comic(s)

Because 만화 ends in a vowel, the object particle is 를:

• vowel + 를
• consonant + 을

Korean often leaves out subjects when they are clear from context.

So 읽어요 does not explicitly say I read or we read, but the meaning is usually understood. In this sentence, it most likely means:

• I read comics together with my niece/nephew or
• we read comics together

The speaker does not need to say 저는 or 우리는 unless they want emphasis or contrast.

읽어요 is the polite non-past form of 읽다.

Non-past in Korean can cover:

• present: read / am reading
• future: will read
• habitual: usually read

In this sentence, the most natural interpretation is often habitual:

• When my niece/nephew comes, we read comics together

But in the right context it could also refer to a future occasion:

• If my niece/nephew comes, we’ll read comics together

Korean often leaves that distinction to context.

Korean does not always need a separate future form when the meaning is already clear from context.

So 읽어요 can naturally mean:

• read
• will read

Because 조카가 오면 already sets up a future or conditional situation, 읽어요 works perfectly well.

A more explicit future form such as 읽을 거예요 is also possible, but it is not necessary here.

It is pronounced roughly like 일거요.

The spelling stays 읽어요, but the sound changes because of Korean pronunciation rules involving the final consonant cluster in 읽-.

So:

• 읽어요 → sounds like 일거요

This is normal in Korean: spelling often reflects the base form of the verb, while pronunciation changes depending on what comes after it.